@inbook{401421,
     title = {15. Deformace a v\v ety o isomorfismu grup},
     booktitle = {\'Uvod do theorie grup [2. roz\v s\'\i \v ren\'e vyd\'an\'\i ]},
     series = {GDML\_Books},
     publisher = {P\v r\'\i rodov\v edeck\'e vydavatelstv\'\i },
     year = {1952},
     pages = {129-137},
     url = {http://dml.mathdoc.fr/item/401421}
}