@article{MAN_1965__160_161287,
     author = {R. CARROLL},
     title = {Problems in {Linked} {Operators.} {II.}},
     journal = {Mathematische Annalen},
     pages = {233--256},
     publisher = {mathdoc},
     volume = {160},
     year = {1965},
     zbl = {0158.14703},
     url = {http://geodesic.mathdoc.fr/item/MAN_1965__160_161287/}
}