及万会,杨春艳.正负相间双曲函数方幂和[J].重庆工商大学学报(自然科学版),2012,29(8):31-35
JI Wan-hui, YANG Chun-yan. Power Sum Alternated with Positive and Negative of Hyperbolic Function[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2012,29(8):31-35