@article{SMJ2_1995_21_3_a2,
     author = {Tsvetkov, Dimitar},
     title = {Mean-Periodic {Solutions} of {Retarded} {Functional} {Differential} {Equations}},
     journal = {Serdica Mathematical Journal},
     pages = {201--218},
     publisher = {mathdoc},
     volume = {21},
     number = {3},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_1995_21_3_a2/}
}