Ergodic properties of a complex continued fraction transformation
International conference on dynamical systems in mathematical physics, Astérisque, no. 40 (1976), 3 p. 
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     author = {Shiokawa, Ietaka},
     title = {Ergodic properties of a complex continued fraction transformation},
     booktitle = {International conference on dynamical systems in mathematical physics},
     author = {Collectif},
     series = {Ast\'erisque},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {40},
     year = {1976},
     zbl = {0349.10044},
     mrnumber = {450205},
     language = {en},
     url = {http://www.numdam.org/item/AST_1976__40__177_0/}
}
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Shiokawa, Ietaka. Ergodic properties of a complex continued fraction transformation, dans International conference on dynamical systems in mathematical physics, Astérisque, no. 40 (1976), 3 p. http://www.numdam.org/item/AST_1976__40__177_0/

[1] R. Kaneiwa, I. Shiokawa and J. Tamura, A proof of Perron's theorem on Diophantine approximation in Eisenstein's field q(-3), to appear.

[2] O. Perron, Über einen Approximationzzatz von Hurwitz und über die Approximation einer komplexen Zahl durch Zahlen des Körpers der dritten Einheitswurzeln, Sitz. d. Bayer (1931), 129-154. | JFM 57.0241.01