@inbook{400173,
     title = {Obsah},
     booktitle = {Bolzano a z\'aklady matematick\'e anal\'yzy},
     series = {GDML\_Books},
     publisher = {Jednota \v cs. matematik\r u a fyzik\r u},
     address = {Praha},
     year = {1981},
     pages = {[89]-[89]},
     url = {http://dml.mathdoc.fr/item/400173}
}

 (éd.). Obsah, dans Bolzano a základy matematické analýzy, GDML_Books,  (1981), p. [89]. http://gdmltest.u-ga.fr/item/400173/