TY - JOUR AU - J. Friedrich TI - Extension of Positive Definite Functions on Lie Groups JO - Journal of Lie theory PY - 1991 SP - 225 EP - 234 VL - 1 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JLT_1991_1_2_a11/ ID - JLT_1991_1_2_a11 ER -