: The world's largest collection of open-access research papers [5].
The "An" and "RAR" suffix could point toward biological research into Retinoic Acid Receptors [1]. Detailed papers on this topic cover the structural and physiological effects of RARs and their cooperation with retinoid X receptors (RXRs). Uk-Su-An.rar
: Often hosts self-archived papers and datasets from individual researchers [3]. : The world's largest collection of open-access research
: A database of millions of free scholarly articles harvested from legal sources [17]. Uk-Su-An.rar