Abbaszadeh, M., Abbaszadeh, M. (2012). Validity and reliability in qualitative researches. Journal of Applied Sociology, 23(1), 19-34. (in Persian)
Arrowsmith, S. (2010). Horizontal policies in public procurement: A taxonomy. Journal of Public Procurement, 10(2), 149–186. doi:10.1017/cbo9780511576041.006.
Barraket, J., & Weissman, J. (2009). Social procurement and its implications for social enterprise: A literature review. (Working Paper No. CPNS48). Retrieved from http://eprints.qut.edu. au/29060/ (Accessed 28th May 2015)
Barraket, J., Keast, R. & Furneaux, C. (2016). Social procurement and new public governance, st Edition, Routledge, NY.
Bovaird, T. (2006). Developing new forms of partnership with the ‘market’ in the procurement of public services. Public Administration. 84(1), 81–102. doi: 10.1111/j.0033-3298.2006.00494.x.
Costa, B.B.F.D., & Motta, A.L.T.S.D. (2019). Key factors hindering sustainable procurement in the Brazilian public sector: A Delphi study. International Journal of Sustainable Development and Planning,
14(2), 152-171. https://doi.org/10.2495/SDP-V14 N2-152-171
Danaeifard, H. (2011). Strategies of Theory Building, Tehran: SAMT. (in Persian)
Delmonicoa, D., Chiappetta Jabbourb, C. J., Farias Pereirac, S. C., De Sousa Jabbourb, A B L., Renwickd, D. W. S. (2018). Unveiling barriers to sustainable public procurement in emerging conomies: Evidence from a leading sustainable supply chain initiative in Latin America, Resources, Conservation & Recycling, 134, 70–79.
Edler, J. and Yeow, J. (2016). Connecting demand and supply: the role of intermediation in public procurement of innovation. Research Policy, 45(2), 414-426.
Erridge, A. (2007). Public procurement, public value and the Northern Ireland Unemployment Pilot Project. Public Administration, 85(4), 1023–1043.
Furneaux, C., & Barraket, J. (2014). Purchasing social good(s): A definition and typology of social procurement. Public Money & Management, 34(4), 265–272.
Grandia, J. & Meehan, J. (2017). Public procurement as a policy tool: using procurement to reach desired outcomes in society. International Journal of Public Sector Management, 30(4), 302-309.
Hall, P. D. (2011). Historical perspectives on nonprofit organizations in the United States. In R. D. Herman, & Associates (Eds.), The Jossey-Bass handbook of non-profit leadership and management (2nd ed., pp. 3–38). San Francisco, CA: Jossey-Bass.
Iman, M. T. (2015). Philosophy of Human Research Method. Qom: Research Institute of Hawzeh and University. (in Persian)
Kamruzzaman, M. D. (2012). Sustainable Procurement: Scope and Practice in the Public Sector in Bangladesh. Dissertation for the Degree of Masters in Procurement and Supply Management, Institute of Governance Studies, BRAC University.
Mcmurray, A.J., Islam, M.M., Siwar, C., Fien, J., (2013). Sustainable procurement in Malaysian organisations: practices, barriers and opportunities. J. Purchasing Supply Manage.
20 (3), 195–207. http://dx.doi.org/10.1016/j.pursup.2014.02.005
Mendoza Jiménez, J.; Hernández López, M., Franco Escobar, S.E., (2019). Sustainable Public Procurement: From Law to Practice. Sustainability, 11, 63-88.
Montalbán-Domingo, L., García-Segura, T., Amalia Sanz, M., Pellicer, E. (2019). Social Sustainability in Delivery and Procurement of Public Construction Contracts, Journal of Management in Engineering,
35(2), 04018065-11. DOI: 10.1061/(ASCE)ME.1943-5479.0000674.
Munoz, S.A. (2009). Social enterprise and public sector voices on procurement. Social Enterprise Journal, 5(1), 69–82. doi:10.1108/17508610910956417
Newman, W. L. (2017). Social Research Methods: Qualitative and Quantitative Approachs. (Translated by Abolhassan Faghihi and Asal Aghaz). Tehran: Termeh Publishing.
Osborne, S. P. (2010). The new public governance: Emerging perspectives on the theory and practice of public governance. London: Routledge.
Safari Dashtaki, M., Zare, R., sharafiyan, Y. (2018). Designing and explaining the model of electronic financial crowdsourcing in social supports A survey in Imam Khomeini Relief Foundation, Fars province. Iranian journal of management sciences, 13(52), 70-90.
Schulten, T., Alsos, K., Burgess, P., & Pedersen, K. (2012). Pay and other Social clauses in European public procurement: An overview on regulation and practices with a focus on Denmark, Germany, Norway, Switzerland and the United Kingdom. Study on behalf of the European Federation of Public Service Unions (EPSU) Düsseldorf, December
Strauss, A., & Corbin, J. (1998). Basics of qualitative research: Techniques and procedures for developing grounded theory (2nd ed.). Sage Publications, Inc.
Temple, N. (2013). The Social Value Act is opening doors and encouraging cross-sector working, but there are still challenges, says Nick Temple, theguardian.com. Tuesday 24 September 2013.
Uyarra, E. (2016). The impact of public procurement of innovation. In Edler, J., Cunningham, P., Gök, A. and Shapira, P. (Eds), Handbook of Innovation Policy Impact, Edward Elgar, pp. 355-381.
Van Lange, P. A. M., De Cremer, D., Van Dijk, E., & Van Vugt, M. (2007). Self-interest and beyond: Basic principles of social interaction. In A. Kruglanski, & E. Higgins, (Eds.), Social psychology: Handbook of basic principles (2nd ed.) (pp. 540–561). New York: Guilford.
Zare, R., Safari, M. (2019). Analysis of Factors Affecting Incidence of Poverty in Families Receiving Support from Aid Organizations: A Case Study of Imam Khomeini Relief Foundation in Fars Province, Iran. Refahj, 19 (74), 47-96. (in Persian)