@article{01044058,
title = {Existence of periodic orbits, set of global solutions and behavior near equilibrium for Volterra equations of retarded type.},
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {54},
year = {1997},
pages = {165-186},
zbl = {0883.34071},
language = {en},
url = {http://dml.mathdoc.fr/item/01044058}
}
Oliva, Waldyr M.; Táboas, Plácido Z. Existence of periodic orbits, set of global solutions and behavior near equilibrium for Volterra equations of retarded type.. Portugaliae Mathematica. Nova Série, Tome 54 (1997) pp. 165-186. http://gdmltest.u-ga.fr/item/01044058/