Fox H-function (Wikipedia)
Meijer G-function (Wikipedia)
Generalized hypergeometric function (Wikipedia)
A M Mathai, R K Saxena, H J Haubold, The H-Function: Theory and Applications (Springer, 2010)
Гаспер Д, Рахман М, Базисные гипергеометрические ряды (Мир, 1993)
B Dwork, Generalized hypergeometric functions (Oxford, Clarendon Press, 1990)
Y L Luke, The special functions and their approximations (AP, 1969)