Raimo Toumela.szerk.: Joseph C. Pitt, Marcello Pera: Science, Protoscience and Pseudoscience, Rational changes in science: essays on scientific reasoning, illustrated, Boston studies in the philosophy of science, Springer, 94, 96. o. (1987). ISBN 978-90-277-2417-5 „If we take such pseudosciences as astrology, the theory of biorhythms, suitable parts of parapsychology, homeopathy and faith healing (...) Such examples of pseudoscience as the theory of biorhythms, astrology, dianetics, creationism, [and] faith healing may seem too obvious examples of pseudoscience for academic readers.”
Persinger (1978). „No evidence for relationship between biorhythms and industrial accidents”. Percept mot Skills46 (2), 423–6. o. DOI:10.2466/pms.1978.46.2.423. PMID662540.
Persinger (1978). „No evidence for relationship between biorhythms and industrial accidents”. Percept mot Skills46 (2), 423–6. o. DOI:10.2466/pms.1978.46.2.423. PMID662540.