Calorimetry study of thermal capacities of alkaloids derivatives anabazini O,O-dimetiltiophosphat and l-ephedrini O,Odiizopropiltiophosphat - Kasenova, Sh.; Abildaeva, A.; Kasenov, B.; Kulgarin, A.; Ermagambet, B.; Phazilov, S. (Chemical Bulletin of Kazakh National University, 2011)