Shilov, V., Lichtenfeld, H., & Sonntag, H. (1995). Fast coagulation of nearly spherical ferric-oxide (hematite) particles. 2. Theoretical contribution to the fast coagulation of particles with different surface curvature. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 104(2-3), 321-325. doi:10.1016/0927-7757(95)03309-7.