@article{10_1017_S0017089500008089,
     author = {Viola-Prioli, Ana M. de and Viola-Prioli, Jorge E.},
     title = {Asymmetry in the lattice of kernel functors},
     journal = {Glasgow mathematical journal},
     pages = {95--97},
     year = {1991},
     volume = {33},
     number = {1},
     doi = {10.1017/S0017089500008089},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500008089/}
}