@article{10_4153_CMB_1973_091_2,
     author = {Swetits, J. and Wood, B.},
     title = {On a {Class} of {Positive} {Linear} {Operators}},
     journal = {Canadian mathematical bulletin},
     pages = {557--559},
     year = {1973},
     volume = {16},
     number = {4},
     doi = {10.4153/CMB-1973-091-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1973-091-2/}
}