Kuhnen-Clausen D, Hagedorn I, Gross G, Bayer H, Hucho F (1983) <br />Interactions of bisquaternary pyridine salts (H-oximes) with cholinergic receptors<br /><i>Archives of Toxicology</i> <b>54</b>: 171<br /><br />Kuhnen-Clausen D, Hagedorn I, Bill R (1979) <br />Synthesis of pyridinium analogues of acetylcholine and their interactions with intestinal muscarinic receptors<br /><i>Journal of Medicinal Chemistry</i> <b>22</b>: 177<br /><br />Kuhnen-Clausen D (1975) <br />Regulatory properties and cooperativity of membrane bound muscarinic receptors of intestinal smooth muscle cells<br /><i>Croatica Chemica Acta</i> <b>47</b>: 465<br /><br />Kuhnen-Clausen D (1974) <br />A novel approach to the questions of allosteric properties or a 'receptor reserve' of drug binding sites of intestinal smooth muscle cells<br /><i>FEBS Letters</i> <b>39</b>: 61<br /><br />Kuhnen-Clausen D (1974) <br />Proceedings: Multiple ligand binding sites at the muscarinic receptor of the guinea pig ileum<br /><i>Naunyn Schmiedebergs Arch Pharmacol</i> <b>282</b>: suppl 282:R53<br /><br />Kuhnen-Clausen D (1972) <br />Structure-activity relationship of mono- and bisquaternary pyridines in regard to their parasympatholytic effects<br /><i>Toxicol Appl Pharmacol</i> <b>23</b>: 443<br /><br />Kuhnen-Clausen D (1970) <br />Investigations on the parasympatholytic effect of toxogonin on the guinea-pig isolated ileum<br /><i>European Journal of Pharmacology</i> <b>9</b>: 85<br /><br />