%0 Journal Article %A Boonpogkrong, Varayu %T Compact operators and integral equations in the $\cal {HK}$ space %J Czechoslovak Mathematical Journal %D 2022 %P 239-257 %V 72 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2021.0447-20/ %R 10.21136/CMJ.2021.0447-20 %G en %F 10_21136_CMJ_2021_0447_20