@article{ZNSL_2006_335_a7,
     author = {S. \`E. Derkachev},
     title = {Factorization of the $\mathrm{R}${-matrix.~I}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {134--163},
     publisher = {mathdoc},
     volume = {335},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2006_335_a7/}
}