%0 Journal Article %A Niemenmaa, Markku %T On finite commutative IP-loops with elementary abelian inner mapping groups of order $p^4$ %J Commentationes Mathematicae Universitatis Carolinae %D 2010 %P 559-563 %V 51 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMUC_2010__51_4_a1/ %G en %F CMUC_2010__51_4_a1