%0 Journal Article %A Clark, Colin %T Rellich′s Embedding Theorem for a “Spiny Urchin” %J Canadian mathematical bulletin %D 1967 %P 731-734 %V 10 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1967-075-6/ %R 10.4153/CMB-1967-075-6 %F 10_4153_CMB_1967_075_6