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Holtermüller KH, Baumeister HG, Arndt-Hanser A, Schäfer A, Eckardt V, Pyka R, Baas U, Wandel E, Ewe K, Overby LR.Holtermüller KH, et al. Among authors: pyka r.Verh Dtsch Ges Inn Med. 1975;81:1359-61.Verh Dtsch Ges Inn Med. 1975.PMID: 1226965German.No abstract available.
Arndt-Hanser A, Pyka R.Arndt-Hanser A, et al. Among authors: pyka r.Vox Sang. 1973;24:Suppl:72-5. doi: 10.1111/j.1423-0410.1973.tb03516.x.Vox Sang. 1973.PMID: 4198173No abstract available.