@article{10_4153_CJM_1967_111_5,
     author = {Sz\'asz, Paul},
     title = {On {The} {Pseudo-Euclidean} {Geometry} {Due} to {G.} {Hessenberg}},
     journal = {Canadian journal of mathematics},
     pages = {1218--1232},
     year = {1967},
     volume = {19},
     number = {1},
     doi = {10.4153/CJM-1967-111-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-111-5/}
}