A note on the accuracy of Ramanujan's approximative formula for the perimeter of an ellipse.
Villarino, Mark B.
JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only], Tome 7 (2006), / Harvested from The Electronic Library of Mathematics
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Publié le : 2006-01-01
EUDML-ID : urn:eudml:doc:116840 
@article{05224536,
     title = {A note on the accuracy of Ramanujan's approximative formula for the perimeter of an ellipse.},
     journal = {JIPAM. Journal of Inequalities in Pure \& Applied Mathematics [electronic only]},
     volume = {7},
     year = {2006},
     zbl = {1182.33032},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05224536}
}

Villarino, Mark B. A note on the accuracy of Ramanujan's approximative formula for the perimeter of an ellipse.. JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only], Tome 7 (2006) . http://gdmltest.u-ga.fr/item/05224536/