@article{SM_2006_197_12_a6,
     author = {A. Ya. Helemskii},
     title = {Quantum versions of vector quality and exponential law in the frame-work of the non-matricial approach},
     journal = {Sbornik. Mathematics},
     pages = {1841--1863},
     year = {2006},
     volume = {197},
     number = {12},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2006_197_12_a6/}
}