1. Hammen , P.D.
Lyme , E. and
Milne , G.M. 2-Aminomethyleneindanone Analgesic Agents. U.S. Patent 4,064,272. January 27, 1977.
2. Bhattacharya , A. and
Rahway , N.J. Preparation of Enantiomers of a Substituted Fluorenyloxyacetic Acid. U.S. Patent 4,587,375. May 6, 1986.
3. Schumacher , J.N. and
Green , C.R. Tobacco Product. U.S. Patent 3,828,795. August 13, 1974.