@article{VMUMM_1988_3_a9,
     author = {A. V. Bushmelev},
     title = {Isometric embeddings of an infinite flat {M\"obius} strip and a flat {Klein} bottle in $\mathbf{R}^4$},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {38--41},
     publisher = {mathdoc},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1988_3_a9/}
}