@article{ANME_2018__12_292720,
     author = {Lech Maligranda and Jan Strelcyn},
     title = {Jan {Ptaszycki} (1854-1912)},
     journal = {Antiquitates Mathematicae},
     volume = {12},
     year = {2018},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/ANME_2018__12_292720/}
}