@article{10_1017_S0017089500007746,
     author = {Kucharz, W.},
     title = {Symplectic bilinear forms on affine real algebraic surfaces},
     journal = {Glasgow mathematical journal},
     pages = {195--198},
     year = {1989},
     volume = {31},
     number = {2},
     doi = {10.1017/S0017089500007746},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007746/}
}