1. Belozerov, G., Mednikova, N., Pytchenko, V., & Serova, E. (2007). Cascade type refrigeration systems working on CO2/NH3 for technological processes of products freezing and storage. In Proceedings of Ohrid 2007 IIR/IIF Conference, April 19–21, Macedonia.
2. Bryson, M. J. (2007). The conversion of low grade heat into electricity using the thermosyphon rankine engine and trilateral flash cycle. PhD. thesis, School of Aerospace, Mechanical and Manufacturing Engineering Science, Engineering and Technology Portfolio RMIT University, August 2007.
3. Chicco, G., & Mancarella, P. (2009). Distributed multi-generation: A comprehensive view. Renewable and Sustainable Energy Reviews,
13, 535–551.
4. Cox, N., Mazur, V., & Colbourne, D. (2009). The development of azeotropic ammonia refrigerant blends for industrial process applications. In Proceedings of Ohrid 2009 IIR/IIF Conference, May 6–8, Macedonia.
5. Gaina, S., Campu, E., & Bucur, G. (1966). Collection of problems of differential and integral calculus (Vol. 2). Bucharest (in Romanian): Technical Publishing House.