@article{10_4064_aa_11_3_281_291,
     author = {S. Kolmer},
     title = {Generalization of the symplectic modular group},
     journal = {Acta Arithmetica},
     pages = {281--291},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1965},
     doi = {10.4064/aa-11-3-281-291},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-11-3-281-291/}
}