Boserup, Anders & Claus Iversen , 1967: Rank analysis of a polarized community: a case study from Northern Ireland, Peace Research Society (International) Papers, 8, pp. 59-76.
2.
Etzioni. Minerva, 1970: The majority of one: toward a theory of regional compatibility . Sage Publications, Beverly Hills, Calif.
3.
Galtung, Johan, (ed.) with Sverre Lodgaard, 1970: Cooperation in Europe. Universitetsforlaget, Oslo /VanGorcum, Assen/ Humanities Press, New York.
4.
Lloyd, William Bross, Jr., 1969: Peace requires peace-makersCenter for the Study of Democratic Institutions, Santa Barbara, Calif.
