1. Action de la lumière sur l'initiation florale du Lolium temulentum AL.: Spectre d'action et role du phytochrome;Blondon;C. R. Acad. Sci. Ser. D,1970
2. Borthwick, H. A. (1966). Letter to Bill Hillman, July 25. Unpublished.
3. The biological significance of phytochrome;Borthwick,1972
4. Role of phytochrome in control of flowering of chrysanthemum;Borthwick;Bot. Gaz.,1962
5. Roles of active phytochrome in control of flowering of Xanthium pensylvanicum;Borthwick;Bot. Gaz.,1964