@article{10_14708_cm_v26i2_6178,
     author = {W. S{\l}omczy\'nski},
     title = {Bounds for periodic solutions of difference and differentia equations},
     journal = {Commentationes Mathematicae},
     pages = { 325--330},
     publisher = {mathdoc},
     volume = {26},
     number = {2},
     year = {1986},
     doi = {10.14708/cm.v26i2.6178},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v26i2.6178/}
}