期刊名称：International Journal of Mathematics and Mathematical Sciences
印刷版ISSN：0161-1712
电子版ISSN：1687-0425
出版年度：1981
卷号：4
DOI：10.1155/S0161171281000094
出版社：Hindawi Publishing Corporation
摘要：For the pair of functional equations
(A)                              (r(t)y′(t))′
