Flipping Letters to minimize the Support of a String.

Giuseppe Lancia Franca Rinaldi Romeo Rizzi Flipping Letters to minimize the Support of a String. 5-17 2008 19 Int. J. Found. Comput. Sci. 1 http://dx.doi.org/10.1142/S0129054108005504 db/journals/ijfcs/ijfcs19.html#LanciaRR08