1. A. E. W. Boyd(1971 ). The effect of planting potato seed tubers affected by dry rot (Fusarium caeruleum) and gangrene (Phoma exiguavar. foveata). Report of the Edinburgh School of Agriculture for 1970, pp.20 -21 .
2. Some effects of potato skin spot (Oospora pustulans) in Scotland
3. A. E. W. Boyd, and J. H. Logan(1967 ). The effect of planting seed tubers affected by dry rot (Fusarium caeruleum) and gangrene(Phoma foveata). Report of the Edinburgh School of Agriculture for1966, pp.25 -27 .