@inbook{402684,
title = {[Tituln\'\i\ str\'anky]},
booktitle = {Po\v cet differenci\'aln\'\i },
series = {GDML\_Books},
publisher = {Jednota \v ceskoslovensk\'ych mathematik\r u a fysik\r u},
address = {Praha},
year = {1923},
pages = {[I]-[III]},
url = {http://dml.mathdoc.fr/item/402684}
}
Petr, Karel. [Titulní stránky], dans Počet differenciální, GDML_Books, (1923), pp. [I]-[III]. http://gdmltest.u-ga.fr/item/402684/