@book{5689034,
	author = {Лебедев, Н.А. and Халкин, В.А.},
	title = {Получение спектрометрических препаратов ¹⁶⁸Тm},
	publisher = {Б. и.},
	year = {1979},
	series = {[Издания]},
	address = {Дубна}
}