@article{RSMUP_2020__144__115_0,
     author = {Alexander A. Fomin},
     title = {A matrix description for torsion free abelian groups of finite rank},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {115--128},
     volume = {144},
     year = {2020},
     doi = {10.4171/rsmup/60},
     mrnumber = {4186450},
     zbl = {1509.20062},
     language = {en},
     url = {http://archive.numdam.org/articles/10.4171/rsmup/60/}
}