@article{RM_1998_53_4_a5,
     author = {V. V. Balashchenko},
     title = {Canonical $f$-structures of  hyperbolic type on regular $\Phi$-spaces},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {861--863},
     publisher = {mathdoc},
     volume = {53},
     number = {4},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1998_53_4_a5/}
}