1. Al-Khcsraji, T. O., and Lösel, D. M., 1981, The fine structure of haustoria, intracellular hyphae and intercellular hyphae of Puccinia poarum, Physiol. Plant Pathol.
19: 301–311.
2. Allen, R. F, 1930, A cytological study of heterothallism in Puccinia graminis, J. Agric. Res.
40: 585–614.
3. Allen, R. F, 1932, A cytological study of heterothallism in Puccinia coronata, J. Agric. Res.
45: 513–541.
4. Allen, R. F, 1933, A cytological study of the teliospores, promycelia, and sporidia in Puccinia malvacearum, Phytopathology
23:572–586.
5. Allen, R. F., 1934, A cytological study of heterothallism in flax rust, J. Agric. Res.
49: 765–791.