1. Angell, H.R., Walker, J.C. & Link, L.P., 1930. The relation of protocatechuic acid to disease resistance in the onion. Phytopathology 20: 431–438.
2. Bailey, J.A. & Mansfield, J.W. (Eds), 1982. Phytoalexins. Blackie & Son Ltd, Glasgow and London, 344 pp.
3. Biehn, W.L., Williams, E.R. & Kuć, J., 1968. Fungitoxicity of phenols accumulating inGlycine max fungi interaction. Phytopathology 58: 1261–1264.
4. Cruickshank, I.A.M., 1963. Phytoalexins. Ann. Rev. Phytopath. 1: 351–374.
5. Heller, R., 1974. Manuel de statistique biologique. Gauthier-Villars, Paris, 290 pp.