1. Tingnell, W., Presented at the International Conference for the Science, Technology and Marketing of Rapeseed, St. Adèle, Canada, 1970.
2. Appelqvist, L.-Å., and B. Lööf, Sveriges Utsädesfören Tidskr 73:310 (1963) (Swedish with English summary).
3. Appelqvist, L.-Å., and B. Lööf, Ibid. 74:183 (1964).
4. Appelqvist, L.-Å., and B. Lööf, Ibid. 75:318 (1965).
5. Lööf, B., and S.-Å. Johansson, Ibid. 76:344 (1966).