TY - JOUR AU - Piotr Wiśniewski TI - On some formula in connected cocommutative Hopf algebras over a field of characteristic 0 JO - Colloquium Mathematicum PY - 2000 SP - 271 EP - 279 VL - 83 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-83-2-271-279/ DO - 10.4064/cm-83-2-271-279 LA - en ID - 10_4064_cm_83_2_271_279 ER -