1. Alvarez, L.H.R., Kanniainen, V., 1997. Optimal entry under uncertainty. University of Helsinki, Department of Economics, Discussion Paper 411.
2. Alvarez, L.H.R., Keppo, J., 1998. The impact of delivery lags on irreversible investment demand under uncertainty. Institute of Applied Mathematics, University of Turku, Research Report A27.
3. Bhattacharya, S., Chatterjee, K., Samuelson, L., 1986. Sequential research and the adoption of innovations. Oxford Economic Papers 38, 219–243, Suppl.
4. Borodin, A., Salminen, P., 1996. Handbook on Brownian Motion — Facts and Formulae. Birkhauser, Basel.
5. Dixit, A.K., Pindyck, R.S., 1994. Investment Under Uncertainty. Princeton University Press, Princeton, NJ.