@article{10_21136_AM_1981_103911,
     author = {Karger, Adolf},
     title = {Similarity motions in $E_3$ with plane trajectories},
     journal = {Applications of Mathematics},
     pages = {194--201},
     publisher = {mathdoc},
     volume = {26},
     number = {3},
     year = {1981},
     doi = {10.21136/AM.1981.103911},
     mrnumber = {0615606},
     zbl = {0474.53008},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.21136/AM.1981.103911/}
}