1: Pereira GR, Lorenzo PL, Carneiro GF, Bilodeau-Goeseels S, Kastelic J, Liu IK. A specific adenylyl cyclase inhibitor (DDA) and a cyclic AMP-dependent protein kinase inhibitor (H-89) block the action of equine growth hormone on in vitro maturation of equine oocytes. Zygote. 2015 Dec;23(6):795-801. doi: 10.1017/S0967199414000434. doi: 10.1371/journal.pone.0058873. 3: Parks RJ, Howlett SE. H-89 decreases the gain of excitation-contraction coupling and attenuates calcium sparks in the absence of beta-adrenergic stimulation. Eur J Pharmacol. 2012 Sep 15;691(1-3):163-72. doi: 10.1016/j.ejphar.2012.07.012. doi: 10.1107/S1744309112028655. 5: Hosseini-Zare MS, Salehi F, Seyedi SY, Azami K, Ghadiri T, Mobasseri M, Gholizadeh S, Beyer C, Sharifzadeh M. Effects of pentoxifylline and H-89 on epileptogenic activity of bucladesine in pentylenetetrazol-treated mice. Eur J Pharmacol. 2011 Nov 30;670(2-3):464-70. doi: 10.1016/j.ejphar.2011.09.026. doi: 10.1371/journal.pone.0005642.