1. S.M. Menchen, S.C. Benson, J.Y.L. Lam, W. Zhen, D. Sun, B.B. Rosenblum, S.H. Khan, M. Taing, US Patent 6,583,168 (2003).
2. Chemical Aspects of Santalin as a Histological Stain
3. G.A. Reynolds, S.A. Tuccio, O.G. Peterson, D.P. Specht, Germany Patent DE2109040 (1971).
4. T. Hideo, Jpn. Tokkyo Koho JP56005480 (1981).