1. R. Wilstatter, E. Waser, Ber. 44, 3423 (1911); 44; 3442 (1911), 48, 6518 (1915).
2. R. Wilstatter, M. Heidelberger, Ber. 46, 517 (1913).
3. W. Reppe, BIOS. 137; 352. Cyclopolyolefins., PB Report 46966.
4. W. Reppe, Report. on Cyclopolyolefines, PB 46996-5, Appendix.
5. W. Reppe, O. Schlichting, K. Klager, T. Topel, Ann. 560, 1?2 (29), 94, 37 (1948).