%0 Journal Article %A Hajek, Darrell W. %T Categories of Wallman extendible functions %J Compositio Mathematica %D 1977 %P 109-111 %V 34 %N 1 %I Noordhoff International Publishing %U http://www.numdam.org/item/CM_1977__34_1_109_0/ %G en %F CM_1977__34_1_109_0