@article{IVM_1991_8_a13,
     author = {S. B. Yakubovich and Thanh H\`ai Nguyẽen},
     title = {Integral convolutions for $H$-transformations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {72--79},
     publisher = {mathdoc},
     number = {8},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_8_a13/}
}