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IIe EECO, Konstanz. 16–19/IV/1975.
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Ottenjann, R., Bartelheimer, W., Busse, R. et al. Endoscopie opératoire, diagnostique et thérapeutique du tube digestif. Acta Endosc 7, 113–115 (1977). https://doi.org/10.1007/BF02973614
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DOI: https://doi.org/10.1007/BF02973614