@article{AUPCDM_2019_11_1_a12,
     author = {Baldwin, John T.},
     title = {To the editor, {Annales} {Universitatis} {Paedagogicae} {Cracoviensis}},
     journal = {Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia},
     pages = {179--180},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPCDM_2019_11_1_a12/}
}