Articles

There are several hundreds and possibly thousands of papers in Real Options. Alexander Triantis, from the University of Maryland, maintains a database of articles, books, conferences etc. Marco Antonio Guimaraes Dias from Brazil also maintains a database with over 2,000 articles.

Link to Alexander Triantis Real Options portal

Link to Marco Antonio Guimaraes Dias website

A book that has a good collection of papers since the beginning of real option theory is

"Real Options and Investment under Uncertainty: Classical Readings and Recent Contributions", by Eduardo S. Schwartz and Lenos Trigeorgis eds., MIT Press, 2001.