@article{01332113,
title = {Positive solutions of Volterra integro-differential equations.},
journal = {Acta Mathematica Universitatis Comenianae. New Series},
volume = {64},
year = {1995},
pages = {113-122},
zbl = {0926.34057},
language = {en},
url = {http://dml.mathdoc.fr/item/01332113}
}
Wu, Yumei. Positive solutions of Volterra integro-differential equations.. Acta Mathematica Universitatis Comenianae. New Series, Tome 64 (1995) pp. 113-122. http://gdmltest.u-ga.fr/item/01332113/