Some journals are published online only (not in print). Articles from online only journals may or may not include volume, issue, or page numbers, and may include an "article ID" number. Follow the journal title with the date you accessed the article, the volume number (if given), the issue number (if given), the article ID#, the URL, and DOI (if given).
Journal titles: For more information the format of journal titles, see the tab Basic Journal Article in this guide.
Piombino A. 2016. The heavy links between geological events and vascular plants evolution: A brief outline. Int J Evol. [accessed 2022 Feb 16];2016:9264357. https://www.hindawi.com/journals/ijeb/2016/9264357/. doi:10.1155/2016/9264357.