@inbook{402794,
     title = {Posta\v cuj\'\i c\'\i\ podm\'\i nky siln\'eho a slab\'eho extr\'emu},
     booktitle = {Kurs varia\v cn\'\i ho po\v ctu},
     series = {GDML\_Books},
     publisher = {P\v r\'\i rodov\v edeck\'e vydavatelstv\'\i },
     year = {1952},
     pages = {194-210},
     url = {http://dml.mathdoc.fr/item/402794}
}