@misc{indiciaebb171bdb31fa, title = {[Occult reflux (author's transl)].}, author = {M W Köllermann and H Scherf and R Busch and W Sietzen and H Klosterhalfen}, year = {1978}, url = {https://pubmed.ncbi.nlm.nih.gov/343343/}, note = {Source identifier: 343343} }