@article{BUMI_2009_9_2_2_a8,
     author = {S\c{e}dziwy, Stanis{\l}aw},
     title = {Periodic {Solutions} of {Scalar} {Differential} {Equations} without {Uniqueness}},
     journal = {Bollettino della Unione matematica italiana},
     pages = {445--448},
     publisher = {mathdoc},
     volume = {Ser. 9, 2},
     number = {2},
     year = {2009},
     zbl = {1178.34045},
     mrnumber = {2537280},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2009_9_2_2_a8/}
}