@article{PORMA_1994__51_2_47078,
     author = {Pavlakos, Panaiotis K. and Stratis, Ioannis G.},
     title = {Periodic solutions to retarded and partial functional differential equations.},
     journal = {Portugaliae mathematica},
     pages = {271--281},
     publisher = {mathdoc},
     volume = {51},
     number = {2},
     year = {1994},
     zbl = {0807.34091},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1994__51_2_47078/}
}