Usuario:Citation bot
The bot obtains citation data from a range of sources, including en:Google Books, Google Books API Family, en:CrossRef, en:AdsAbs, en:arXiv, oaDOI and PubMed.Because scraping data from web pages is unreliable and resource-intensive, these databases are the main source of data; unfortunately, the bot is unable to tell when these databases contain errors or incomplete information.Any such error or omission should be reported directly to the data repository maintainer.The bot also corrects citations to match WP:CITALICSRFC and similar.Note that a 503 error means that the bot is overloaded and you should try again later – wait at least an hour.