@article{1077490638,
author = {Lehmer, D. H.},
title = {A cotangent analogue of continued fractions},
journal = {Duke Math. J.},
volume = {4},
number = {1},
year = {1938},
pages = { 323-340},
language = {en},
url = {http://dml.mathdoc.fr/item/1077490638}
}
Lehmer, D. H. A cotangent analogue of continued fractions. Duke Math. J., Tome 4 (1938) no. 1, pp. 323-340. http://gdmltest.u-ga.fr/item/1077490638/