it should be noted though that extended quotes properly sourced are not generally a violation of copyright i'd like to see a few examples we have never to my recollection and knowledge had a legal complaint or threat of any kind about a properly sourced quote there could be exceptions such as quoting the entire lyrics of a poem or song in a single block quote but that isn't what we are talking about here we're talking about a block quote of a passage from an academic paper published behind a firewall by elsevier i find it very hard to imagine a serious legal issue with that