@article{10_4064_ap_44_3_317_324,
     author = {P. G. Walczak},
     title = {On balls and totally geodesic submanifolds},
     journal = {Annales Polonici Mathematici},
     pages = {317--324},
     publisher = {mathdoc},
     volume = {44},
     number = {3},
     year = {1984},
     doi = {10.4064/ap-44-3-317-324},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-44-3-317-324/}
}