@INPROCEEDINGS( PSC2006c, 
 author = "Giuseppe Lancia and Franca Rinaldi and Romeo Rizzi",
 title = "Flipping letters to minimize the support of a string",
 booktitle = "Proceedings of the Prague Stringology Conference~'06",
 address = "Czech Technical University in Prague, Czech Republic",
 editor = "Jan Holub and Jan {\v{Z}}{\v{d}}{\'{a}}rek",
 isbn = "80-01-03533-6",
 year = 2006,
 pages = "9--17",
 bibsource="http://www.stringology.org/event/2006/psc06p03.bib",
)