P. Ditchburn

Rapid screening for the isolation of mutants of Aspergillus nidulans with increased penicillin yields.

P. Ditchburn, B. Giddings, K. D. Macdonald, 1974, The Journal of applied bacteriology.

The differential effects of nystatin on growth of auxotrophic and prototrophic strains of Aspergillus nidulans.

P. Ditchburn, K. D. Macdonald, 1971, Journal of general microbiology.