@article{SM_1991_70_1_a11,
     author = {V. Yu. Shelepov},
     title = {On the index and spectrum of integral operators of potential type along {Radon} curves},
     journal = {Sbornik. Mathematics},
     pages = {175--203},
     publisher = {mathdoc},
     volume = {70},
     number = {1},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1991_70_1_a11/}
}