Padmini Tamilenthi, V., and N. Sulochana. “Synthesis and Characterization of Dimers With Azo and Salicylaldimine As Linking Group”. Asian Journal of Chemistry, vol. 21, no. 8, Mar. 2010, pp. 6375-84, https://asianpubs.org/index.php/ajchem/article/view/12331.