@article{MASLO_1980_30_1_a8,
     author = {Kol\'a\v{r}, Ivan},
     title = {Structure morphisms of prolongation functors},
     journal = {Mathematica slovaca},
     pages = {83--93},
     year = {1980},
     volume = {30},
     number = {1},
     mrnumber = {568217},
     zbl = {0425.58004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1980_30_1_a8/}
}