@article{10_4064_fm_156_2_99_110,
     author = {Jerzy B. Nowak},
     title = {$L_2$-characteristic classes of {Maslov{\textendash}Trofimov} of hamiltonian systems on the {Lie} algebra of the upper-triangular matrices},
     journal = {Fundamenta Mathematicae},
     pages = {99--110},
     publisher = {mathdoc},
     volume = {156},
     number = {2},
     year = {1998},
     doi = {10.4064/fm-156-2-99-110},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-156-2-99-110/}
}