@article{MSH_1991__116__23_0,
     author = {Gregorowicz, Jan},
     title = {The theory of definitions in the polish logical literature},
     journal = {Math\'ematiques informatique et sciences humaines},
     pages = {23--27},
     publisher = {Ecole des hautes-\'etudes en sciences sociales},
     volume = {116},
     year = {1991},
     mrnumber = {1167760},
     zbl = {0794.03008},
     language = {en},
     url = {http://www.numdam.org/item/MSH_1991__116__23_0/}
}