Fakhar N. Memon and Shahabuddin Memon , Trans., “Calixarenes: A Versatile Source for the Recovery of Reactive Blue-19 Dye from Industrial Wastewater”, Pak. J. Anal. Environ. Chem., vol. 13, no. 2, pp. 148 – 158, Dec. 2012, doi: 10.21743/.