Vanhoorne, P., Van den Bossche, G., Fontaine, F., Sobry, R., Jerome, R., & Stamm, M. (1994). SAXS STUDY OF OMEGA-METAL AND ALPHA,OMEGA-METAL SULFONATO POLYSTYRENES IN TOLUENE SOLUTION. Macromolecules, 27(3), 838-843. doi:10.1021/ma00081a032.