@article{MOMA_1989__107_3_178431,
     author = {B.P. Duggal},
     title = {On {Generalised} {Putnam-Fuglede} {Theorems.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {309--332},
     publisher = {mathdoc},
     volume = {107},
     number = {3},
     year = {1989},
     zbl = {0713.47020},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1989__107_3_178431/}
}