@article{ZNSL_1984_133_a17,
     author = {L. A. Takhtadzhyan},
     title = {Solutions of the triangle equations with $\mathbb Z_n\times\mathbb Z_n$-symmetry as the matrix analogues of the {Weierstrass} zets and sigma functions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {258--276},
     year = {1984},
     volume = {133},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1984_133_a17/}
}