Publications with shared reference: Characterization of <i>β</i> ‐adrenoceptor mediated smooth muscle relaxation and the detection of mRNA for <i>β</i> <sub>1</sub> ‐, <i>β</i> <sub>2</sub> ‐ and <i>β</i> <sub>3</sub> ‐adrenoceptors in rat ileum