Raut, R.D., and M.R. Patil. “Synthesis and Characterisation of Cr(III), Fe(II) and Pd(II) Complexes With 4-Methyl Isonitrosoacetophenone”. Asian Journal of Chemistry, vol. 13, no. 2, Mar. 2010, pp. 534-8, https://asianpubs.org/index.php/ajchem/article/view/22625.