GULERIA, B.S., A.K. MANAV, and A.K. INDRAYAN. 2010. “Isolation and Extraction of Medicinally Useful Dye from the Heartwood of Caesalpinill Sappan Linn. Using Different Solvents”. Asian Journal of Chemistry 9 (4):816-18. https://asianpubs.org/index.php/ajchem/article/view/23970.