@article{10_4064_aa_56_1_1_18,
     author = {Norman Richert},
     title = {A generalization of a theorem of {Euler} for regular chains of complex quadratic irrationalities},
     journal = {Acta Arithmetica},
     pages = {1--18},
     publisher = {mathdoc},
     volume = {56},
     number = {1},
     year = {1990},
     doi = {10.4064/aa-56-1-1-18},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-56-1-1-18/}
}