%0 Journal Article %A Chajda, Ivan %A Emanovský, Petr %T $\Sigma$-Hamiltonian and $\Sigma$-regular algebraic structures %J Mathematica Bohemica %D 1996 %P 177-182 %V 121 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/MB.1996.126108/ %R 10.21136/MB.1996.126108 %G en %F 10_21136_MB_1996_126108