Koskinen L.-O. D., Koch M. L., and Svedberg J., “Cerebrovascular Effects of the TRH Analogues pGlu-3-methyl-His-Pro Amide and pGlu-Glu-Pro Amide: A Comparison with TRH”, ujms, vol. 105, no. 1, pp. 73-84, Jul. 2000.