Khudaverdian, Hovhannes M. Max Planck Institute for Mathematics, Max Planck Society;
Khudaverdian_geometry_oa_2013.pdf (Any fulltext), 402KB
Khudaverdian, H. M., & Voronov, T. T. (2013). Geometry of differential operators of second order, the algebra of densities, and groupoids. Journal of Geometry and Physics, 64, 31-53. doi:10.1016/j.geomphys.2012.10.008.