@book{9238,
	author = {Pregel, boris(ed.)},
	title = {Annals of the New York Academy of Sciences},
	publisher = {New york academy of sciences},
	year = {1975},
	series = {261-263},
	note = {No. S - 145 / 74 - 75 / 03.03.1975 & Sup. I / 74 - 75 / 27.06.1975 & S - 239 / 75 - 76 / 31.08.1975}
}