@article{10_4153_CJM_1967_098_9,
     author = {Sherk, F. A.},
     title = {Finite {Incidence} {Structures} with {Orthogonality}},
     journal = {Canadian journal of mathematics},
     pages = {1078--1083},
     year = {1967},
     volume = {19},
     number = {1},
     doi = {10.4153/CJM-1967-098-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-098-9/}
}