Reference Label	Details
Heilbronner 1977	E. Heilbronner, T. Hoshi, J. L. von Rosenberg, and K. Hafner, Nouv. j. chim. 1, 105-112 (1977) Alkyl-Induced, Natural Hypsochromic Shifts of the 2A - 2X and 2B - 2X Transitions of Azulene and Naphthalene Radical Cations