TY - JOUR AU - M. Libine TI - The Two-Loop Ladder Diagram and Representations of U(2,2) JO - Journal of Lie theory PY - 2017 SP - 771 EP - 8 VL - 27 IS - 3 UR - http://geodesic.mathdoc.fr/item/JLT_2017_27_3_JLT_2017_27_3_a7/ ID - JLT_2017_27_3_JLT_2017_27_3_a7 ER -