@article{JAC_2005__22_2_a4,
     author = {De Winter, S. and Thas, J.A.},
     title = {On semi-pseudo-ovoids},
     journal = {Journal of Algebraic Combinatorics},
     pages = {139--149},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {2005},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/JAC_2005__22_2_a4/}
}