@article{MM2_1994__83_3-4_155968,
     author = {Helmer Aslaksen and Eng-Chye Tan},
     title = {Generic 2 x 2 {Matrices} with involution.},
     journal = {Manuscripta mathematica},
     pages = {365--386},
     publisher = {mathdoc},
     volume = {83},
     number = {3-4},
     year = {1994},
     zbl = {0814.16019},
     url = {http://geodesic.mathdoc.fr/item/MM2_1994__83_3-4_155968/}
}