@article{10_4153_CMB_1989_008_6,
     author = {Ljubi\'c, Dragoslav},
     title = {Bireflectionality in {Absolute} {Geometry}},
     journal = {Canadian mathematical bulletin},
     pages = {54--63},
     year = {1989},
     volume = {32},
     number = {1},
     doi = {10.4153/CMB-1989-008-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1989-008-6/}
}