Okazaki, S., Suzuki, M., & Duncan, K. K. The influence of repeated frowning and smiling on corrugator muscle activity and wrinkles between eyebrows. Nature Portfolio.
Chicago Style (17th ed.) CitationOkazaki, Shuntaro, Makito Suzuki, and Keith Kawabata Duncan. The Influence of Repeated Frowning and Smiling on Corrugator Muscle Activity and Wrinkles Between Eyebrows. Nature Portfolio.
MLA (9th ed.) CitationOkazaki, Shuntaro, et al. The Influence of Repeated Frowning and Smiling on Corrugator Muscle Activity and Wrinkles Between Eyebrows. Nature Portfolio.
Warning: These citations may not always be 100% accurate.