@article{PORMA_1997__54_2_47828,
     author = {Oliva, Waldyr M. and T\'aboas, Pl\'acido Z.},
     title = {Existence of periodic orbits, set of global solutions and behavior near equilibrium for {Volterra} equations of retarded type.},
     journal = {Portugaliae mathematica},
     pages = {165--186},
     publisher = {mathdoc},
     volume = {54},
     number = {2},
     year = {1997},
     zbl = {0883.34071},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1997__54_2_47828/}
}