@article{MZM_1996_60_4_a4,
     author = {F. Fagnola and R. Monte},
     title = {Quantum extensions of semigroups generated by {Bessel} processes},
     journal = {Matemati\v{c}eskie zametki},
     pages = {519--537},
     year = {1996},
     volume = {60},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1996_60_4_a4/}
}