@article{MZM_2001_70_6_a1,
     author = {B. Jefferies and G. W. Johnson},
     title = {Feynman's {Operational} {Calculi} for {Noncommuting} {Systems} of {Operators:} {Tensors,} {Ordered} {Supports,} and {Disentangling} an {Exponential} {Factor}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {815--838},
     publisher = {mathdoc},
     volume = {70},
     number = {6},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2001_70_6_a1/}
}