@article{MZ_1977__155_172552,
     author = {Peter Hess},
     title = {A {Remark} on the {Preceding} paper of {Fucik} and {Krbec.}},
     journal = {Mathematische Zeitschrift},
     pages = {139--142},
     publisher = {mathdoc},
     volume = {155},
     year = {1977},
     zbl = {0356.35030},
     url = {http://geodesic.mathdoc.fr/item/MZ_1977__155_172552/}
}