@article{COMIM_1995_3_1_a1,
     author = {D{\l}otko, Tadeusz},
     title = {Some records on second order differential equations},
     journal = {Communications in Mathematics},
     pages = {21--26},
     year = {1995},
     volume = {3},
     number = {1},
     mrnumber = {1474062},
     zbl = {0854.34015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/COMIM_1995_3_1_a1/}
}