Callan, E., &quot; In re Mr. and Mrs. Doe: witnesses before the grand jury and the head of state immunity doctrine &quot; , New York University Journal of International Law and Politics, vol. 22 (1989), pp. 117-139.
Callan, E., &quot; In re Mr. and Mrs. Doe: witnesses before the grand jury and the head of state immunity doctrine &quot; , New York University Journal of International Law and Politics, vol. 22 (1989), pp. 117-139.