TY - JOUR AU - Yuji Kobayashi TI - An extension theorem of functionals on commutative semigroups JO - Studia Mathematica PY - 1981 SP - 87 EP - 90 VL - 69 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/sm-69-1-87-90/ DO - 10.4064/sm-69-1-87-90 LA - en ID - 10_4064_sm_69_1_87_90 ER -