@article{MZ_1979__167_172833,
     author = {Karel Ehrlich},
     title = {Cross {Sections} in {Fibrations.}},
     journal = {Mathematische Zeitschrift},
     pages = {7--14},
     publisher = {mathdoc},
     volume = {167},
     year = {1979},
     zbl = {0388.55012},
     url = {http://geodesic.mathdoc.fr/item/MZ_1979__167_172833/}
}