1. T. Albu and C. NĂstĂsescu, Relative finiteness in module theory. Marcel Dekker, New York (1984).
2. R.R. Colby and E.A. Rutter, Jr., Generalizations of QF-3 algebras, Trans. Amer. Math. Soc. 153 (1971), 371–386.
3. S. Endo, On semi-hereditary rings, J. Math. Soc. Japan 13 (1961), 109–119.
4. J.L. García, J.L. Gómez Pardo and J. Martínez, Semiperfect modules relative to a torsion theory, to appear in J. Pure Appl. Algebra.
5. J.L. García and J.L. Gómez Pardo, Projective modules and their endomorphism rings, to appear.