@book{825194,
	author = {En Ha and Zhang Le},
	title = {Zhi xing yan jiu zhong de zi liao fen xi : Ji suan ji fu zhu fang fa ying yong zhi nan},
	publisher = {Chong qing da xue chu ban she,},
	year = {2012.},
	address = {Chongqing :}
}