@article{ZNSL_1996_234_a13,
     author = {V. A. Sharafutdinov},
     title = {Curvature and absorption},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {187--189},
     publisher = {mathdoc},
     volume = {234},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1996_234_a13/}
}