S. Boldyryev, P. Kapustenko, L. Tovazhnyansky, A. Garev, O. Perevertaylenko, G. Khavin, O. Arsenyeva, J. Klemeš, Ammonia Refrigeration Cycle Integration in Buildings Heating System, Chemical Engineering Transactions. 29 (2012) 1453-1458. doi:10.3303/CET1229243.