@article{10_4153_CMB_1988_013_8,
     author = {Holub, J. R.},
     title = {On {Shift} {Operators}},
     journal = {Canadian mathematical bulletin},
     pages = {85--94},
     year = {1988},
     volume = {31},
     number = {1},
     doi = {10.4153/CMB-1988-013-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1988-013-8/}
}