@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/