@article{SM_1973_21_3_a6,
     author = {Yu. A. Aminov},
     title = {The exterior diameter of an immersed {Riemannian} manifold},
     journal = {Sbornik. Mathematics},
     pages = {449--454},
     publisher = {mathdoc},
     volume = {21},
     number = {3},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_21_3_a6/}
}