@article{MM2_1977__23_154523,
     author = {Wolfgang Alte},
     title = {Some {Periodicity} {Criteria} for {Functional} {Differential} {Equations.}},
     journal = {Manuscripta mathematica},
     pages = {295--318},
     publisher = {mathdoc},
     volume = {23},
     year = {1977},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MM2_1977__23_154523/}
}