1. Anonym I: Europ. Plant Protect. Organisation (EPPO) Paris. Report Serv. 31. 10. 1960.
2. Anonym II: Annual Report, East Mailing Res. Stat., 1959 (1960).
3. Ark, P. A., and J. P. Thompson: Plant Dis. Reptr. 44, 102–103 (1960).
4. Beardsley, R. E.: J. Bact. 80, 180–187 (1960).
5. Benben, K.: Las polski 33, 11–14 (1959).