(en) Nakamura, « Mokichi Okada's Idea of Ultimate Reality and Meaning », Ultimate Reality and Meaning, vol. 11, no 4, , p. 283 (ISSN0709-549X, DOI10.3138/uram.11.4.279)
Suzuki, Uchida, Kimura et Tanaka, « International Cross-Sectional Study on the Effectiveness of Okada Purifying Therapy, a Biofield Therapy, for the Relief of Various Symptoms », The Journal of Alternative and Complementary Medicine, vol. 26, no 8, , p. 708–720 (ISSN1075-5535, PMID32551797, PMCID7410282, DOI10.1089/acm.2019.0264)
(en) Nakamura, « Mokichi Okada's Idea of Ultimate Reality and Meaning », Ultimate Reality and Meaning, vol. 11, no 4, , p. 283 (ISSN0709-549X, DOI10.3138/uram.11.4.279)
Suzuki, Uchida, Kimura et Tanaka, « International Cross-Sectional Study on the Effectiveness of Okada Purifying Therapy, a Biofield Therapy, for the Relief of Various Symptoms », The Journal of Alternative and Complementary Medicine, vol. 26, no 8, , p. 708–720 (ISSN1075-5535, PMID32551797, PMCID7410282, DOI10.1089/acm.2019.0264)
Suzuki, Uchida, Kimura et Tanaka, « International Cross-Sectional Study on the Effectiveness of Okada Purifying Therapy, a Biofield Therapy, for the Relief of Various Symptoms », The Journal of Alternative and Complementary Medicine, vol. 26, no 8, , p. 708–720 (ISSN1075-5535, PMID32551797, PMCID7410282, DOI10.1089/acm.2019.0264)