@article{10_4153_CJM_1986_055_5,
     author = {Livorni, Elvira Laura},
     title = {Classification of {Algebraic} {Surfaces} {withSectional} {Genus} less than or {Equal} to {Six.II:} {Ruled} {Surfaces} with dim {\ensuremath{\varphi}Kx\ensuremath{\otimes}L(x)} = l},
     journal = {Canadian journal of mathematics},
     pages = {1110--1121},
     year = {1986},
     volume = {38},
     number = {5},
     doi = {10.4153/CJM-1986-055-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1986-055-5/}
}