Geodesic
POSITIVE SOLUTIONS OF VOLTERRA INTEGRO-DIFFERENTIAL EQUATIONS
Acta mathematica Universitatis Comenianae, Tome 64 (1995) no. 1 
YUMEI Wu. POSITIVE SOLUTIONS OF VOLTERRA INTEGRO-DIFFERENTIAL EQUATIONS. Acta mathematica Universitatis Comenianae, Tome 64 (1995) no. 1. http://geodesic.mathdoc.fr/item/AMUC_1995_64_1_a8/
@article{AMUC_1995_64_1_a8,
     author = {YUMEI Wu},
     title = {POSITIVE {SOLUTIONS} {OF} {VOLTERRA} {INTEGRO-DIFFERENTIAL} {EQUATIONS}},
     journal = {Acta mathematica Universitatis Comenianae},
     year = {1995},
     volume = {64},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/AMUC_1995_64_1_a8/}
}
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Voir la notice de l'article provenant de la source Comenius University

Sufficient conditions for existence of positive solutions of integro\hyphdifferential equations of Volterra type are given and existence of solutions with zero crossing $(0, +\infty)$ of integro\hyphdifferential equations is investigated.