@article{10_4153_CMB_1969_038_3,
     author = {Boyd, David W.},
     title = {Monotone {Semigroups} of {Operators} on {Cones*}},
     journal = {Canadian mathematical bulletin},
     pages = {299--309},
     year = {1969},
     volume = {12},
     number = {3},
     doi = {10.4153/CMB-1969-038-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-038-3/}
}