@article{DAN_1957_112_3_a3,
     author = {P. L. Ul'yanov},
     title = {On $A$-integrals of {Cauchy} for contours},
     journal = {Doklady Akademii Nauk},
     pages = {383--385},
     publisher = {mathdoc},
     volume = {112},
     number = {3},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_112_3_a3/}
}