TITLE: Ramanujan 1918 paper
QUESTION [5 upvotes]: Does anybody know where I can find Ramanujan's paper from 1918 titled "On Certain Arithmetical Functions." It is referenced in wikipedia, under the Ramanujan Summation section, but I cannot find a link to it. It is supposed to contain proofs to some interesting identities.

REPLY [3 votes]: I would suggest Ramanujan's collected works.