TY - JOUR AU - Walukiewicz, I. TI - Foreword JO - RAIRO. Theoretical Informatics and Applications PY - 2005 SP - 421 EP - 422 VL - 39 IS - 3 PB - EDP-Sciences UR - https://www.numdam.org/articles/10.1051/ita:2005031/ DO - 10.1051/ita:2005031 LA - en ID - ITA_2005__39_3_421_0 ER -