@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/}
}