1. Atanassov, K.: On Generalized Nets Theory. Prof. M. Drinov Academic Publ. House, Sofia (2007)
2. Atanassov, K., Shannon, A.: Principal generalized net model of an excretory system. In: Proceedings of the Fifth International Workshop on Generalized Nets, Sofia, pp. 13–18 (2004)
3. Atanassov, K., Chakarov, V., Shannon, A., Sorsich, J.: Generalized Net Models of the Human Body. Prof. M. Drinov Publishing House, Sofia (2008)
4. Atanassov, K., Chakarov, V., Shannon, A.: Principal generalized net model of the human muscle-skeletal system. In: Proceedings of Scientific Session of Burgas Free University, Burgas, vol. III, pp. 392–398 (2006)
5. Chakarov, V., Shannon, A., Atanassov, K.: Principal generalized net model of endocrine system. Comptes rendus de l’Academie Bulgare des Sci. 61(6), 705–712 (2008)