Cytogenetic effect of the natural modifiers of mutagenesis in a human lymphocyte culture effect of caffeine in the induction of chromosome aberrations by gibberellic acid Arutyunyan, R.M.; Zalinyan, G.G. Tsitologiya i Genetika 21(2): 101-105 1987 https://eurekamag.com/research/005/085/005085302.php