%0 Journal Article %A Janyška, Josef %T On linear functions on the sphere $S^2$ %J Czechoslovak Mathematical Journal %D 1981 %P 75-82 %V 31 %N 1 %I mathdoc %U https://geodesic-test.mathdoc.fr/articles/10.21136/CMJ.1981.101724/ %R 10.21136/CMJ.1981.101724 %G en %F 10_21136_CMJ_1981_101724