TY - JOUR AU - Tomaszewski, Witold TI - On laws of the form $ab\equiv ba$ equivalent to the abelian law JO - Rendiconti del Seminario Matematico della Università di Padova PY - 2016 SP - 19 EP - 34 VL - 136 PB - European Mathematical Society Publishing House PP - Zuerich, Switzerland UR - http://www.numdam.org/articles/10.4171/RSMUP/136-3/ DO - 10.4171/RSMUP/136-3 ID - RSMUP_2016__136__19_0 ER -