Emmelin N, Gjörstrup P
Experientia. 1976 Feb 15;32(2):197-8. doi: 10.1007/BF01937762.
In slowly secreting submandibular glands of dogs, a sympathetic effect on myoepithelial cells was demonstrated as an acceleration of the flow, followed by retardation, on short-lasting sympathetic stimulation, particularly after beta-adrenoceptor-blocking drugs.