MASS-SPECTROMETRY STUDY OF LINEAR AND ANGULAR 3',4'-DIOXYSUBSTITUTED DIHYDROPYRANOCOUMARINS AND THEIR DERIVATIVES ArticleZAKHAROV P.I., TERENTEV P.B., NIKONOV G.K., AVRAMENKO L.G.KHIMIYA PRIRODNYKH SOEDINENII. 1977. P.. 38-44
VOLTAGE MASS-SPECTRA OF MONOOXYDIHYDROPYRANOCOUMARINS AND MONOACYLOXYDIHYDROPYRANOCOUMARINS AND DIHYDROFUROCOUMARINS ArticleZAKHAROV P.I., TERENTJEV P.B., NIKONOV G.K.KHIMIYA PRIRODNYKH SOEDINENII. 1977. P.. 212-215