@article{SM_1995_80_2_a11,
     author = {A. A. Makhnev},
     title = {On strongly regular extensions of generalized quadrangles},
     journal = {Sbornik. Mathematics},
     pages = {497--505},
     publisher = {mathdoc},
     volume = {80},
     number = {2},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_80_2_a11/}
}