@article{IVM_1968_4_a4,
     author = {V. A. Dem'yanenko},
     title = {The indeterminate equations $x^6+y^6=az^2$, $x^6+y^6=az^3$, $x^4+y^4=az^4$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {26--32},
     publisher = {mathdoc},
     number = {4},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1968_4_a4/}
}