Úvahy pomocné
Úvod do neeukleidovské geometrie, GDML_Books, (1926), p. 183-[203] / Harvested from
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@inbook{402729,
     title = {\'Uvahy pomocn\'e},
     booktitle = {\'Uvod do neeukleidovsk\'e geometrie},
     series = {GDML\_Books},
     publisher = {Jednota \v Ceskoslovensk\'ych matematik\r u a fysik\r u},
     address = {Praha},
     year = {1926},
     pages = {183-[203]},
     url = {http://dml.mathdoc.fr/item/402729}
}

 (éd.). Úvahy pomocné, dans Úvod do neeukleidovské geometrie, GDML_Books,  (1926), pp. 183-[203]. http://gdmltest.u-ga.fr/item/402729/