@article{10_4064_ap_18_3_227_233,
     author = {K. Zima},
     title = {On a differential inequality with a lagging argument},
     journal = {Annales Polonici Mathematici},
     pages = {227--233},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {1966},
     doi = {10.4064/ap-18-3-227-233},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-18-3-227-233/}
}