Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{10_21136_CPMF_1947_122783, author = {Kruml, M.}, title = {Te\v{c}ny a norm\'aly ku\v{z}elose\v{c}ek}, journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky}, pages = {D22}, publisher = {mathdoc}, volume = {72}, number = {4}, year = {1947}, doi = {10.21136/CPMF.1947.122783}, language = {cz}, url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1947.122783/} }
Kruml, M. Tečny a normály kuželoseček. Časopis pro pěstování matematiky a fysiky, Tome 72 (1947) no. 4, p. D22. doi : 10.21136/CPMF.1947.122783. http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1947.122783/
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