Song, X., Qiu, Z., Yang, X., Gong, H., Zheng, S., Cao, B., Wang, H., Möhwald, H., & Shchukin, D. (2014). Submicron-Lubricant Based on Crystallized Fe3O4 Spheres for Enhanced Tribology Performance. Chemistry of Materials, 26(17), 5113-5119. doi:10.1021/cm502426y.