Effect of gamma-ray on some optical properties of polymetheylacrelate film (PMMA) doping with phenolphthalein (phph). Period. Eng. Nat. Sci. [Internet]. 2019 Aug. 1 [cited 2026 Jun. 24];7(2). Available from: https://pen.ius.edu.ba/index.php/pen/article/view/1590