Sen, A. (1997). "The role of opportunism in the software design reuse process". IEEE Transactions on Software Engineering. 23 (7): 418–436. doi:10.1109/32.605760.
"Regulatory Filing". FINRA.org. Financial Industry Regulatory Authority, Inc. on behalf of the U.S. Securities and Exchange Commission (SEC). Archived from the original on 5 February 2017. Retrieved 4 February 2017.
"Regulatory Filing". FINRA.org. Financial Industry Regulatory Authority, Inc. on behalf of the U.S. Securities and Exchange Commission (SEC). Archived from the original on 5 February 2017. Retrieved 4 February 2017.