@article{GMJ_2003__10_1_51058,
     author = {Grammatikopoulos, M.K. and Koplatadze, R. and Stavroulakis, I.P.},
     title = {On the oscillation of solutions of first-order differential equations with retarded arguments.},
     journal = {Georgian Mathematical Journal},
     pages = {63--76},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {2003},
     zbl = {1051.34051},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/GMJ_2003__10_1_51058/}
}