@article{SM_1971_15_3_a2,
     author = {Yu. D. Burago},
     title = {An estimate from below for the spatial diameter of a~surface in terms of its intrinsic radius and curvature},
     journal = {Sbornik. Mathematics},
     pages = {405--414},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_15_3_a2/}
}