@article{RSMUP_1975__53__135_0,
     author = {Fuchs, L. and Gr\"abe, P.},
     title = {Number of indecomposable summands in direct decompositions of torsion-free abelian groups},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {135--148},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {53},
     year = {1975},
     mrnumber = {422452},
     zbl = {0338.20059},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1975__53__135_0/}
}