Hopkins 1968, p. 211. Hopkins, John (1968). "Powers in the Nature of a Trust. Powers Collateral. Certainty of Objects". Cambridge Law Journal. 26 (2). Cambridge University Press. ISSN0008-1973.
Hopkins 1968, 212. Hopkins, John (1968). "Powers in the Nature of a Trust. Powers Collateral. Certainty of Objects". Cambridge Law Journal. 26 (2). Cambridge University Press. ISSN0008-1973.