@article{10_4153_CJM_1988_064_5,
     author = {Sands, A. D. and Stewart, P. N.},
     title = {General {Heredity} and {Strength} for {Radical} {Classes}},
     journal = {Canadian journal of mathematics},
     pages = {1410--1421},
     year = {1988},
     volume = {40},
     number = {6},
     doi = {10.4153/CJM-1988-064-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1988-064-5/}
}