@article{10_4153_CJM_1969_079_4,
     author = {Brown, Benson Samuel},
     title = {A {First} {Approximation} to {{X,} {Y}}},
     journal = {Canadian journal of mathematics},
     pages = {702--711},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-079-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-079-4/}
}