Source: https://www.researchgate.net/profile/Peter-Stockinger/publication/275828219_Seminaire_Ingenierie_de_projets_de_communication_Sixieme_Partie_Le_plan_de_communication_etape_par_etape/links/554767e70cf2f5349a86dfc0/Seminaire-Ingenierie-de-projets-de-communication-Sixieme-Partie-Le-plan-de-communication-etape-par-etape.pdf