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Andrassy K, Ritz E, Wiedler Ch, Bommer J, Möhring K.Andrassy K, et al. Among authors: ritz e.Dtsch Med Wochenschr. 1975 Mar 21;100(12):611-4. doi: 10.1055/s-0028-1106266.Dtsch Med Wochenschr. 1975.PMID: 1122803German.
Malluche HH, Ritz E.Malluche HH, et al. Among authors: ritz e.MMW Munch Med Wochenschr. 1976 Jan 30;118(5):129-30.MMW Munch Med Wochenschr. 1976.PMID: 814442German.No abstract available.
Ritz E, Malluche HH, Röher HD, Krempien B, Koch KM, Andrassy K.Ritz E, et al.Dtsch Med Wochenschr. 1973 Mar 9;98(10):484-96. doi: 10.1055/s-0028-1106841.Dtsch Med Wochenschr. 1973.PMID: 4691570German.No abstract available.