yes you nailed it. At the moment if there are multiple implementation the author can just (rather arbitrarily) add the github implementation he/she likes the mo

yes you nailed it. At the moment if there are multiple implementation the author can just (rather arbitrarily) add the github implementation he/she likes the most as "github" link, and other code implementations as side links. ie rnn-char (http://gitxiv.com/posts/W6Y3pLrEAG5jmuJzz/char-rnn http://gitxiv.com/posts/W6Y3pLrEAG5jmuJzz/char-rnn) main and original torch implementation, with to the side extra info + links to pure python, chainer, caffe (apollo). Maybe not the most elegant solution, but it works for now :)