@inbook{401097, title = {1.2 Spir\'aly}, booktitle = {Historick\'y v\'yvoj pojmu k\v rivka}, series = {GDML\_Books}, publisher = {Nadace Universitas v Brn\v e}, address = {Brno}, year = {2007}, pages = {23-28}, url = {http://dml.mathdoc.fr/item/401097} }
(éd.). 1.2 Spirály, dans Historický vývoj pojmu křivka, GDML_Books, (2007), pp. 23-28. http://gdmltest.u-ga.fr/item/401097/