@article{ARM_1980__16_1_a3,
     author = {Mehri, B.},
     title = {Periodic solution of certain second order differential equation},
     journal = {Archivum mathematicum},
     pages = {39--44},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1980},
     mrnumber = {594665},
     zbl = {0452.34036},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1980__16_1_a3/}
}