@article{BSMF_1989__117_1_59_0,
     author = {Tong, Jingcheng},
     title = {Symmetric and asymmetric {Diophantine} approximation of continued fractions},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {59--67},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {117},
     number = {1},
     year = {1989},
     doi = {10.24033/bsmf.2112},
     mrnumber = {90k:11086},
     zbl = {0684.10030},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/bsmf.2112/}
}