Koh IJ, Kang YG, Chang CB, Song J, Jeon YT, Kim TK. Use of reduced-dose periarticular injection for pain management in simultaneous bilateral total knee arthroplasty. J Arthroplasty. 2012 Oct;27(9):1731–1736.e1. doi: 10.1016/j.arth.2012.03.054. PMID: 22682046.