@article{RSMUP_1991__86__183_0,
     author = {Ostendorf, Uwe},
     title = {Projektivit\"atstypen torsionsfreier abelscher {Gruppen} vom {Rang} 1},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {183--191},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {86},
     year = {1991},
     mrnumber = {1154107},
     zbl = {0795.20041},
     language = {de},
     url = {http://archive.numdam.org/item/RSMUP_1991__86__183_0/}
}