TY - JOUR AU - Bisgaard, Torben Maack TI - Characterization of perfect involution groups. JO - Mathematica Scandinavica PY - 1989 VL - 65 IS - 2 SP - 245 EP - 258 KW - Abelian semigroup with involution; positive definite function; Radon measure; locally convex topology; perfection; semiperfection; torsion- free Abelian group UR - http://eudml.org/doc/167082 ER -