@article{10_1017_S001708950000923X,
     author = {Burnap, Charles and Lambert, Alan},
     title = {Proximity and similarity of operators {II}},
     journal = {Glasgow mathematical journal},
     pages = {205--213},
     year = {1990},
     volume = {32},
     number = {2},
     doi = {10.1017/S001708950000923X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950000923X/}
}