Agarwal, Ravi P. O'Regan, Donal Wong, Patricia, J.Y.
Positive solutions of differential, difference and integral equations - London Kluwer Academic Publishers 1999 - 416
0 7923 5510 5
517.9 AGA
Positive solutions of differential, difference and integral equations - London Kluwer Academic Publishers 1999 - 416
0 7923 5510 5
517.9 AGA