Jacques Epelbaum published a paper on regulation of growth hormone secretion in Comprehensive Physiology
Steyn FJ, Tolle V, Chen C & Epelbaum J. 2016. Neuroendocrine regulation of growth hormone secretion. Comprehensive Physiology 6: 687-735.
It is available at https://www.researchgate.net/profile/Jacques_Epelbaum2