1. Thiele, H. undH. Lamp, Kolloid-Z.129, 25 (1952).
2. Voyutskii, S. S., in: Uspekhi Khimii i Tekhnologii Polimerov, Vol. III (Moscow 1960).
3. Nitschmann, H. undJ. Schrade, Helv. Chim. Acta31, 297 (1948).
4. Hirai, N., J. Chem. Soc. Japan, Pure Chem. Sect.75, 1019 (1954).
5. Erbring, H., Kolloid-Beih.44, 171 (1936).