@article{ZNSL_2003_300_a27,
     author = {E. V. Volkov},
     title = {Hyperbolic structure for the quadratic map},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {266--272},
     publisher = {mathdoc},
     volume = {300},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2003_300_a27/}
}