1. Histogenesis of melanocytes;Okun;J. In-vest. Derm.,1965
2. Uber histogenetische Beziehungen zwischen Mastzellen und Melanocyten. Fahig-keit der Mastzellen Melanin zu Bilden;Okun;Hautarzt,1967
3. Evidence of tyrosinase activity in mast cells;Okun;Abs. J. Invest. Derm.,1968
4. Additional studies of tyrosinase in mast cells;Okun;Fed. Proc,1969
5. Tyrosinase activity in vertebrate melanocytes;Fitzpatrick,1959