@article{10_1017_S000843950002909X,
     author = {Okubo, Tanjiro},
     title = {Elementary {Differential} {Geometry} by {Barret} {O'Neill.} {Academic} {Press,} 1966.},
     journal = {Canadian mathematical bulletin},
     pages = {315--316},
     year = {1968},
     volume = {11},
     number = {2},
     doi = {10.1017/S000843950002909X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S000843950002909X/}
}