TY - JOUR AU - Alexander A. Fomin TI - A matrix description for torsion free abelian groups of finite rank JO - Rendiconti del Seminario Matematico della Università di Padova PY - 2020 SP - 115 EP - 128 VL - 144 UR - http://www.numdam.org/articles/10.4171/rsmup/60/ DO - 10.4171/rsmup/60 LA - en ID - RSMUP_2020__144__115_0 ER -