Another version of “exotic characterization of a commutative<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="$H^\ast$"><mml:msup><mml:mi>H</mml:mi><mml:mo>∗</mml:mo></mml:msup></mml:math>-algebra”
International journal of mathematics and mathematical sciences