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Verhulst, J. (1993). "Louis Bolk revisited II—Retardation, hypermorphosis and body proportions of humans". Medical Hypotheses. 41 (2): 100–114. doi:10.1016/0306-9877(93)90054-T. PMID8231987.
Verhulst, J. (1993). "Louis Bolk revisited II—Retardation, hypermorphosis and body proportions of humans". Medical Hypotheses. 41 (2): 100–114. doi:10.1016/0306-9877(93)90054-T. PMID8231987.
