Rp. Agarwal et D. Oregan, NONLINEAR SUPERLINEAR SINGULAR AND NONSINGULAR 2ND-ORDER BOUNDARY-VALUE-PROBLEMS, Journal of differential equations, 143(1), 1998, pp. 60-95
Many new existence theorems are presented Tor singular and nonsingular
second order boundary value problems. Singularities at y = 0, t = 0,
and t = 1 will be discussed. (C) 1998 Academic Press.