J. Ning, C. Yang, L. Bi, J. Zhao, L. Meng, and Y. Yang, “Separation/Preconcentration and Determination of Scutellarin in Urine by Vortex-Assisted Surfactant-Enhanced Emulsification Microextraction and High Performance Liquid Chromatography”, ajc, vol. 27, no. 1, pp. 43–46, Dec. 2014.