Portna, K. P., and S. O. Vasyuk. 2015. “β-Alanine Spectrophotometric Determination in Reaction With Sodium Salt of 1,2-Naphthoquinone-4-Sulfonic Acid”. Zaporozhye Medical Journal 17 (1). https://doi.org/10.14739/2310-1210.2015.1.39870.