@article{PIM_1985_N_S_37_51_a19,
     author = {Hukum Singh},
     title = {On the {Focal} {Locus} of a {Submanifold} in a {Riemannian} {Manifold} of {Constant} {Sectional} {Curvature}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {107 },
     publisher = {mathdoc},
     volume = {_N_S_37},
     number = {51},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1985_N_S_37_51_a19/}
}