@article{PIM_1995_N_S_58_72_a11,
     author = {A.A. Balkema and J.L. Geluk and L. de Haan},
     title = {Measuring asymptotic convexity},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {106 },
     publisher = {mathdoc},
     volume = {_N_S_58},
     number = {72},
     year = {1995},
     zbl = {0901.26003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1995_N_S_58_72_a11/}
}