@misc{10_1017_S001708950000968X,
     title = {Quadratic isoparametric systems in {Rn+mp}},
     journal = {Glasgow mathematical journal},
     pages = {135--143},
     year = {1993},
     volume = {35},
     number = {2},
     doi = {10.1017/S001708950000968X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950000968X/}
}