Rook GA, Stanford JL., The Koch phenomenon and the immunopathology of tuberculosis., in Curr Top Microbiol Immunol., vol. 215, 1996, pp. 239-62, PMID 8791717.
Rook GA., Role of activated macrophages in the immunopathology of tuberculosis., in Br Med Bull., vol. 44, n. 3, Jul 1988, pp. 611-23, PMID 3076809.
Drössler K., Robert Koch--also a pioneer in immunological research?, in Allerg Immunol (Leipz), vol. 28, n. 1, 1982, pp. 13-20, PMID 6214169.
Daniel TM., Clemens Freiherr von Pirquet and the tuberculin test., in Int J Tuberc Lung Dis., vol. 7, n. 12, Dec 2003, pp. 1115-6., PMID 14677885.
Landi S, Held HR., The need to redefine the unit of the international standard for tuberculin purified protein derivative (PPD-S)., in Dev Biol Stand., vol. 58, Pt B, 1986, pp. 589-94., PMID 3609456.