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Heard, S. R., B. Wren, M. J. Barnett, J. M. Thomas, and S. Tabaqchali. Clostridium Difficile Infection in Patients With Haematological Malignant Disease. Risk Factors, Faecal Toxins and Pathogenic Strains. Cambridge University Press, 1988.

Heard, S. R., et al. Clostridium Difficile Infection in Patients With Haematological Malignant Disease. Risk Factors, Faecal Toxins and Pathogenic Strains. Cambridge University Press, 1988.