Efimtseva, Ekaterina V.; Bobkov, Georgii V.; Mikhailov, Sergey N.; Van Aerschot, Arthur; Schepers, Guy; Busson, Roger; Rozenski, Jef; Herdewijn, Piet Helvetica Chimica Acta, 2001, vol. 84, # 8 p. 2387 - 2397 doi: 10.1002/1522-2675(20010815)84:8<2387::AID-HLCA2387>3.0.CO;2-F