@article{GDZPPN00223968X, title = {The ...-form and a generalized Maslov index.}, journal = {Manuscripta mathematica}, volume = {95}, year = {1998}, pages = {189-212}, zbl = {0920.58045}, url = {http://dml.mathdoc.fr/item/GDZPPN00223968X} }
Bunke, U.; Koch, H. The ...-form and a generalized Maslov index.. Manuscripta mathematica, Tome 95 (1998) pp. 189-212. http://gdmltest.u-ga.fr/item/GDZPPN00223968X/