1. Invariant subspaces for positive operators;Abramovich;J. Funct. Anal.,1994
2. Multiplication and compact-friendly operators;Abramovich;Positivity,1997
3. The invariant subspace problem: Some recent advances;Abramovich;Rend. Istit. Mat. Univ. Trieste,1998
4. A characteri-zation of compact-friendly multiplication operators;Abramovich;Indag. Math.,1999
5. Positive Operators;Aliprantis,1985