@article{10_14708_dm_v40i0_6457,
     author = {by editors},
     title = {Anna {Zofia} {Krygowska} 30th anniversary of death},
     journal = {Didactica Mathematicae},
     pages = { 159--161},
     publisher = {mathdoc},
     volume = {40},
     year = {2018},
     doi = {10.14708/dm.v40i0.6457},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/dm.v40i0.6457/}
}