@book{1254137,
	author = {Чекин, А. Л.},
	title = {Математика},
	publisher = {Академкнига/Учебник},
	year = {2007},
	series = {Перспективная начальная школа},
	address = {Москва},
	edition = {Изд. 2-е, испр.}
}