1. Studies on the crown gall disease of certain fruit and ornamental trees in U.A.R. M.Sc.;Abo-El-Nil;Thesis, Faculty of Agric., Alex. Univ., Alex., Egypt,1967
2. Unabhängige induktion von teratomen und wurzeln durch mischungen verschiedener stämme von Agrobacterium
3. Bacterial and host factors concerned in determining tumour morphology in crown gall;Braun;Bot. Gaz,1953
4. Morphology and physiology of plant tumours;Braun;Protoplasmatologia,1958
5. The tendency of the crown gall organism to produce roots in conjunction with tumours;Brown;J. Agr. Res,1929