TY - JOUR AU - Y. Yoshii TI - Root Systems Extended by an Abelian Group and their Lie Algebras JO - Journal of Lie Theory PY - 2004 SP - 371 EP - 394 VL - 14 IS - 2 UR - https://jolt.centre-mersenne.org/articles/10.5802/jolt.342/ DO - 10.5802/jolt.342 ID - JOLT_2004_14_2_a2 ER -