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Beeh KM, Beier J, Lerch C, Schulz AK, Buhl R (2004). "Effects of piclamilast, a selective phosphodiesterase-4 inhibitor, on oxidative burst of sputum cells from mild asthmatics and stable COPD patients". Lung. 182 (6): 369–77. doi:10.1007/s00408-004-2518-z. PMID15765929. S2CID2558906.
Sun JG, Deng YM, Wu X, Tang HF, Deng JF, Chen JQ, et al. (October 2006). "Inhibition of phosphodiesterase activity, airway inflammation and hyperresponsiveness by PDE4 inhibitor and glucocorticoid in a murine model of allergic asthma". Life Sciences. 79 (22): 2077–85. doi:10.1016/j.lfs.2006.07.001. PMID16875702.
Hirose R, Manabe H, Nonaka H, Yanagawa K, Akuta K, Sato S, et al. (November 2007). "Correlation between emetic effect of phosphodiesterase 4 inhibitors and their occupation of the high-affinity rolipram binding site in Suncus murinus brain". European Journal of Pharmacology. 573 (1–3): 93–9. doi:10.1016/j.ejphar.2007.06.045. PMID17658510.
Beeh KM, Beier J, Lerch C, Schulz AK, Buhl R (2004). "Effects of piclamilast, a selective phosphodiesterase-4 inhibitor, on oxidative burst of sputum cells from mild asthmatics and stable COPD patients". Lung. 182 (6): 369–77. doi:10.1007/s00408-004-2518-z. PMID15765929. S2CID2558906.