@inbook{402099,
     title = {Rejst\v r\'\i k symbol\r u},
     booktitle = {Oby\v cejn\'e diferenci\'aln\'\i\ rovnice},
     series = {GDML\_Books},
     publisher = {SNTL - Nakladatelstv\'\i\ technick\'e literatury},
     address = {Praha},
     year = {1978},
     pages = {416-416},
     url = {http://dml.mathdoc.fr/item/402099}
}