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@article{PORMA_1990__47_1_115697, author = {Wegner, Bernd}, title = {On transnormal horizons of convex hypersurfaces}, journal = {Portugaliae mathematica}, pages = {19--24}, publisher = {mathdoc}, volume = {47}, number = {1}, year = {1990}, mrnumber = {1079503}, zbl = {0643.53046}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1990__47_1_115697/} }
Wegner, Bernd. On transnormal horizons of convex hypersurfaces. Portugaliae mathematica, Tome 47 (1990) no. 1, pp. 19-24. http://geodesic.mathdoc.fr/item/PORMA_1990__47_1_115697/