@phdthesis {1348, title = {An{\'a}lisis structural de redes de Petri, programaci{\'o}n lineal y geometr{\'\i}a convexa}, volume = {Tesis Doctoral}, year = {1989}, month = {06/1989}, school = {Universidad de Zaragoza}, address = {Zaragoza, Espa{\~n}a}, author = {J.M. Colom} }