Cölfen, H. Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;
Cölfen, H., Husbands, P., & Harding, S. E. (1995). Alternative light sources for the Schlieren optical system of analytical ultracentrifuges. Progress in Colloid and Polymer Science, 99, 193-198. doi:10.1007/BFb0114089.