A High Performance Approximate Algorithm for the Steiner Problem in Graphs. - Pere Guitart; Josep M. Basart (RANDOM, 1998)

A Solution for the Coloured Cubes Problem. - Josep M. Basart; Pere Guitart (Theor. Comput. Sci., 1999)

A Faster Implementation of Zelikovsky's 11/6-Approximation Algorithm for the Steiner Problem in Graphs. - Pere Guitart (Electron. Notes Discret. Math., 2001)