@article{10_4064_sm_98_1_91_94,
     author = {Zvi Artstein and Tadeusz Rze\.zuchowski},
     title = {A note on {Olech's} {Lemma}},
     journal = {Studia Mathematica},
     pages = {91--94},
     publisher = {mathdoc},
     volume = {98},
     number = {1},
     year = {1991},
     doi = {10.4064/sm-98-1-91-94},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-98-1-91-94/}
}