References
- Warkel RL, Luna LG, Hetwig EB: A modified Warthin-Starry procedure at low pH for melanin. Am J Clin Pathol 73:812–815, 1980
- Luna LG: Warkel-Luna-Helwig method for melanin. In Histopathologic Methods and Color Atlas of Special Stains and Tissue Artifacts. American Histolabs, Kolb Center, MD, 1992, pp 352–354
- Luna LG: Fontana-Masson silver method. In Manual of Histologic Staining Methods of the Armed Forces Institute of Pathology, 3rd ed. McGraw Hill Co, New York, 1968, pp 104–105