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Walter M, Böning K, Reppel PD.Walter M, et al. Among authors: boning k.J Dent. 1994 Dec;22(6):346-8. doi: 10.1016/0300-5712(94)90086-8.J Dent. 1994.PMID: 7844262
Klinger E, Walter M, Böning K.Klinger E, et al. Among authors: boning k.Dent Labor (Munch). 1991 Dec;39(12):1797-9.Dent Labor (Munch). 1991.PMID: 1817983German.No abstract available.
Roggensack M, Walter MH, Böning KW.Roggensack M, et al. Among authors: boning kw.Dent Mater. 1993 Mar;9(2):104-7. doi: 10.1016/0109-5641(93)90084-4.Dent Mater. 1993.PMID: 8595837
Klinger E, Böning K, Walter M.Klinger E, et al. Among authors: boning k.Dtsch Zahnarztl Z. 1991 Nov;46(11):743-5.Dtsch Zahnarztl Z. 1991.PMID: 1817876German.
Reppel PD, Böning K, Walter M.Reppel PD, et al. Among authors: boning k.Dtsch Zahnarztl Z. 1991 Nov;46(11):756-8.Dtsch Zahnarztl Z. 1991.PMID: 1817880German.