title = {Designing proxies for stock market indices is computationally hard<sup>*</sup>},
author = {M. Y. Kao and S. R. Tate}, journal = {Quantitative Finance}, number = {3}, pages = {361--371}, publisher = {Routledge}, url = {http://www.informaworld.com/10.1080/713665725}, volume = {1}, year = {2001}, issn = {1469-7688},
keywords = {imported }