N. S. Vul'fson, V. I. Zaretskii, V. A. Puchkov, V. G. Zaikin, A. M. Shkrob, V. K. Antonov, M. M. Shemyakin, “Mutual transformations of cyclols and cyclodepsipeptides, as studied by means of fragmentary mass-spectrometry”, Dokl. Akad. Nauk SSSR, 153:2 (1963), 336–339
