Mariëlle Matthee is a freelance researcher and writer. Brigit Toebes is a Lecturer in International Law at the University of Groningen, the Netherlands. Both Mariëlle Matthee and Brigit Toebes were colleagues of Avril McDonald at the T.M.C. Asser Instituut in The Hague and worked closely with her on several projects. Marcel Brus is Professor of Public International Law at the University of Groningen, at the department where Avril worked during the last years of her life.

• Fighting by the Principles: Principles as a Source of International Humanitarian Law.- Chivalry: A Principle of the Law of Armed Conflict? Military Robots and the Principle of Humanity – Distorting the Human Face of the Law? Some Reflections on Self-Defence as an Element in Rules of Engagement.-The Current Relevance of the Recognition of Belligerency.- In Search of a Human Face in the Middle East: Addressing Israeli impunity for War Crimes.- Doctors in Arms: Exploring the Legal and Ethical Position of Military Medical Personnel in Armed Conflicts.- Saving the Past, Present and Future. Thoughts on Mobilizing International Protection for Cultural Property During Armed Conflict.- Watching the Human Rights Watchers .- Armed Conflict and Law Enforcement – Is There a Legal Divide? Friend or Foe? On the Protective Reach of the Law of Armed Conflict.- Seeking the Truth about Serious International Human Rights and Humanitarian Law Violations: The various Facets of a Cardinal Notion of Transitional Justice.- La responsabilité pénale des autorités politiques pour des crimes de droit international humanitair (DIH).- Discrepancies Between International Humanitarian Law on the Battlefield and in the Courtroom: The Challenges of Applying International Humanitarian Law During International Criminal Trials.