@article{10_4153_CJM_1967_103_4,
     author = {B\"ohm, J.},
     title = {Zur {Verallgemeinerung} der {Neperschen} {Regel} in {r-Dimensionalen} {Riemannschen} {R\"aumen} {Konstanter} {Kr\"ummung}},
     journal = {Canadian journal of mathematics},
     pages = {1129--1148},
     year = {1967},
     volume = {19},
     number = {1},
     doi = {10.4153/CJM-1967-103-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-103-4/}
}