@article{TMF_1990_83_1_a9,
     author = {E. V. Gusev},
     title = {Onsager approximation and asymptotically exact solution of~the {Ashkin{\textendash}Teller} model},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {83--91},
     year = {1990},
     volume = {83},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1990_83_1_a9/}
}