%0 Journal Article %A Howes, Frederick A. %T A necessary condition for twin boundary layer behavior %J Czechoslovak Mathematical Journal %D 1980 %P 80-83 %V 30 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1980.101657/ %R 10.21136/CMJ.1980.101657 %G en %F 10_21136_CMJ_1980_101657