@article{SIGMA_2013_9_a29,
     author = {Igor G. Korepanov and Nurlan M. Sadykov},
     title = {Pentagon {Relations} in {Direct} {Sums} and {Grassmann} {Algebras}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2013},
     volume = {9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2013_9_a29/}
}