Gabriela Jeronimo Guillermo Matera Pablo Solernó Ariel Waissbein Deformation Techniques for Sparse Systems. 1-50 2009 9 Foundations of Computational Mathematics 1 http://dx.doi.org/10.1007/s10208-008-9024-2 db/journals/focm/focm9.html#JeronimoMSW09