This is a code that identifies the article: - a: the article was published in the 'a' section - 20180815: the date of publication is August 15, 2018 - 388863: the article's unique identifier
This is a code that identifies the article: - a: the article was published in the 'a' section - 20180815: the date of publication is August 15, 2018 - 388863: the article's unique identifier