Tong, W. J., Zhu, Y., Wang, Z. P., Gao, C. Y., & Möhwald, H. (2010). Micelles-encapsulated microcapsules for sequential loading of hydrophobic and water-soluble drugs. Macromolecular Rapid Communications, 31(11), 1015-1019. doi:10.1002/marc.200900881.