@article{KYB_1993_29_6_a6,
     author = {Bongers, Peter M. M.},
     title = {A new robust stability margin},
     journal = {Kybernetika},
     pages = {609--616},
     year = {1993},
     volume = {29},
     number = {6},
     mrnumber = {1264890},
     zbl = {0925.93808},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1993_29_6_a6/}
}