@article{MZ_1963__82_170198,
     author = {Karl Hinderer},
     title = {\"Uber {Rekurrenz} gewisser zeitlich inhomogener {Irrfahrten.}},
     journal = {Mathematische Zeitschrift},
     pages = {379--388},
     year = {1963},
     volume = {82},
     zbl = {0117.13204},
     url = {http://geodesic.mathdoc.fr/item/MZ_1963__82_170198/}
}