1. Tres observaciones sobre el algebra lineal;Birkhoff;Univ. Nac. Tucumán Rev. Ser. A,1946
2. On clans of nonnegative matrices;Brown;Proc. Amer. Math. Soc.,1964
3. Sums of random variables in groups and the purity law;Brown;Z. Wahrscheinlichkeitstheorie und Verw. Gebiete,1974
4. On the convergence of series of independent random variables taking on values in a Banach space;Buldygin;Theor. Probability Math Statist.,1975
5. On infinite products of independent random elements on metric semigroups;Byczkowski;Colloq. Math.,1977