Zhao, Guo-Liang, and Jia-Lu Liu. 2012. “Synthesis, Crystal Structure of a Novel Two-Dimensional Complex of Manganese(II) With 2-Phenoxypropionic Acid and 4,4’-Bipyridine”. Asian Journal of Chemistry 24 (5):2028-30. https://asianpubs.org/index.php/ajchem/article/view/8949.