F.F.DrehmannF.F., [Drehmann's sign. A clinical examination method in epiphysiolysis (slipping of the upper femoral epiphysis). Description of signs, aetiopathogenetic considerations, clinical experience], „Zeitschrift Fur Orthopadie Und Ihre Grenzgebiete”, 117 (3), 1979, s. 333-344, PMID: 463224(niem.).a?
