1. Andronov, E. & Alexandrova, M. (2004). Network organizations - nature, problems and prospects for development, Management and sustainable development, (11), 3-4, 10-14. http://oldweb.ltu.bg/jmsd/files/articles/11/11-01_E_Andronov_M_Alexandrova.pdf
2. Atanasova, A. (2020). Cluster integration increasing the small and medium-sized enterprises competitiveness’ in Bulgaria. University press. Neofit Rilski, Blagoevgrad, 243
3. Atanasova, A. & Vladov, R. (2014). Co-creation of value through the exchange of personnel within the cluster association of corporate IT sector, Eleventh International Conference "Smart specialization of Bulgaria". IBSEDU, Sofia, Bulgaria, 155 – 168. https://ibsedu.bg/media/Conference/2014/_2014_1.pdf
4. Bertalanffy, L. (1951). General system theory - A new approach to unity of science (Symposium), Human Biology, 23 (4), 303-361.
5. Bogdanova, M. & Tsvetanova, E. (2012). The network approach in the regional innovation systems’ research. Dialog extraordinary thematic II. https://www2.uni-svishtov.bg/dialog_old/2012/INI/38-statia-2011.pdf