Über die Anzahl Abelscher Gruppen gegebener Ordnung. I. Hans-Egon Richert (1952) Mathematische Zeitschrift
Über die Untergruppen der elementarabelschen Gruppen L. TESCHKE (1975) Beiträge zur Algebra und Geometrie = Contributions to algebra and geometry
Über nicht-eindeutige Zerlegungen in irreduzible Elemente. Alfred Geroldinger (1988) Mathematische Zeitschrift
Ulm Invariants of the Brauer Group of a Field. Murray Schacher, Burton Fein (1977) Mathematische Zeitschrift
Ulm Invariants of the Brauer Group of a Field. II. Murray Schacher, Burton Fein (1978) Mathematische Zeitschrift
Un ejemplo de teoría de homotopía en los grupos abelianos. Luis Javier Hernandez Paricio (1982) Collectanea Mathematica
Una caratterizzazione reticolare del reticolo dei sottogruppi di un gruppo abeliano contenente due elementi aperiodici indipendenti Carlo Maria Scoppola (1985) Rendiconti del Seminario Matematico della Università di Padova
Una proprietà caratteristica dei gruppi abeliani torsionalmente completi Adalberto Orsatti (1969) Rendiconti del Seminario Matematico della Università di Padova
Undecidable theories of valuated abelian groups Peter H. Schmitt (1984) Mémoires de la Société Mathématique de France
Unextendible sequences in finite abelian groups. Zhuang, Jujuan (2008) The Electronic Journal of Combinatorics [electronic only]
Unique reducibility of subsets of commutative topological groups and semigroups. Victor Klee, David Gale (1975) Mathematica Scandinavica
Unital Rings whose Additive Endomorphisms Commute. R.A. Bowshell, P. Schultz (1977) Mathematische Annalen
Valuated Butler groups of special type László Fuchs, Gerhardus Viljoen (1999) Czechoslovak Mathematical Journal
Valued vector spaces and abelian p -groups Laszlo Fuchs (1976/1977) Groupe d'étude d'algèbre Groupe d'étude d'algèbre
Varieties with modular and distributive lattices of symmetric or reflexive relations Ivan Chajda (1992) Czechoslovak Mathematical Journal