@inbook{403990,
     title = {Kapitola 2. Zvl\'a\v stn\'\i\ polohy p\'ol\r u $P$ a $Q$
               },
     booktitle = {Zaj\'\i mav\'e dvojice troj\'uheln\'\i k\r u},
     series = {GDML\_Books},
     publisher = {Mlad\'a fronta},
     address = {Praha},
     year = {1980},
     pages = {88-152},
     url = {http://dml.mathdoc.fr/item/403990}
}