@article{10_4064_ba52_4_2,
     author = {Marcin Paw{\l}owski},
     title = {Periodic {Solutions} of {Periodic} {Retarded} {Functional} {Differential} {Equations}},
     journal = {Bulletin of the Polish Academy of Sciences. Mathematics},
     pages = {353--363},
     publisher = {mathdoc},
     volume = {52},
     number = {4},
     year = {2004},
     doi = {10.4064/ba52-4-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ba52-4-2/}
}