@article{SM_2011_202_10_a4,
     author = {A. Yu. Savin and B. Yu. Sternin},
     title = {On the index of elliptic operators for the group of dilations},
     journal = {Sbornik. Mathematics},
     pages = {1505--1536},
     publisher = {mathdoc},
     volume = {202},
     number = {10},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2011_202_10_a4/}
}