Guntrip, H (setembro de 1978). «Psychoanalysis and some scientific and philosophical critics: (Dr Eliot Slater, Sir Peter Medawar and Sir Karl Popper)». The British Journal of Medical Psychology. 51 (3): 207–24. PMID356870. doi:10.1111/j.2044-8341.1978.tb02466.x
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Guntrip, H (setembro de 1978). «Psychoanalysis and some scientific and philosophical critics: (Dr Eliot Slater, Sir Peter Medawar and Sir Karl Popper)». The British Journal of Medical Psychology. 51 (3): 207–24. PMID356870. doi:10.1111/j.2044-8341.1978.tb02466.x