@article{IVM_1989_4_a1,
     author = {M. A. Akivis and A. M. Shelekhov},
     title = {Fourth-order alternators of a~local analytic loop and three-webs of multidimensional surfaces},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {12--16},
     publisher = {mathdoc},
     number = {4},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1989_4_a1/}
}