Předmluva
Rovinné grafy, GDML_Books, (1977), p. 3-6 / Harvested from
@inbook{403904,
     title = {P\v redmluva},
     booktitle = {Rovinn\'e grafy},
     series = {GDML\_Books},
     publisher = {Mlad\'a fronta},
     address = {Praha},
     year = {1977},
     pages = {3-6},
     url = {http://dml.mathdoc.fr/item/403904}
}
 (éd.). Předmluva, dans Rovinné grafy, GDML_Books,  (1977), pp. 3-6. http://gdmltest.u-ga.fr/item/403904/