@article{10_1017_S0017089502008984,
     author = {ALBRECHT, E. and VASILESCU, F.-H.},
     title = {INVARIANT {SUBSPACES} {FOR} {SOME} {FAMILIES} {OF} {UNBOUNDED} {SUBNORMAL} {OPERATORS}},
     journal = {Glasgow mathematical journal},
     pages = {53--67},
     year = {2003},
     volume = {45},
     number = {1},
     doi = {10.1017/S0017089502008984},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089502008984/}
}