@incollection{AST_1991__198-199-200__259_0,
     author = {Nakada, Hitoshi and Wagner, Gerold},
     title = {Duffin-Schaeffer theorem of diophantine approximation for complex numbers},
     booktitle = {Journ\'ees arithm\'etiques de Luminy 17-21 Juillet 1989},
     editor = {Lachaud Gilles},
     series = {Ast\'erisque},
     pages = {259--263},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {198-199-200},
     year = {1991},
     mrnumber = {1144329},
     zbl = {0749.11034},
     language = {en},
     url = {http://www.numdam.org/item/AST_1991__198-199-200__259_0/}
}