7Krauss R, Stephan K. Literature survey on thermophysical properties of natural refrigerants. Proc. IIF/IIR Gustav Lorentzen Conf, Oslo, Norway, 1998 : 441 -- 48.
8Clodic D,Cai W. Tests and simulations of difusion of various hydrocarbons in rooms form air conditioners and refrigerators. Prec. of IIF/IIR Conf. Applications for Natural Refrigerants, Aarhus, Denmark, 1996.
9Eric Granryd. Hydrocarbons as refrigerants--an overview.International Journal of Refrigeration,2001 ;(24) :15--24.
10Richardson R, Butterworth J. The performance of propane/isobutane mixtures in vapor compression systems, International Journal of Refrigeration, 1995 ; 18 (1) : 58-- 62.
