@article{GDZPPN002317923,
title = {On Best Two-Dimensional Dirichlet-Approximations and their Algorithmic Calculation.},
journal = {Mathematische Annalen},
volume = {243},
year = {1979},
pages = {1-32},
zbl = {0413.10026},
url = {http://dml.mathdoc.fr/item/GDZPPN002317923}
}
Peyerimhoff, A.; Kratz, W.; Jurkat, W. On Best Two-Dimensional Dirichlet-Approximations and their Algorithmic Calculation.. Mathematische Annalen, Tome 243 (1979) pp. 1-32. http://gdmltest.u-ga.fr/item/GDZPPN002317923/