1. Davison, A., in Technetium in Chemistry and Nuclear Medicine, Vol. 1, ed. E. Deutsch, M. Nicolini and H. N. Wagner Jr. Cortina International, Verona, Italy, 1983, p. 3.
2. Deutsch, E., Nicolini, M. and Wagner, H. N. Jr. ed., Technetium in Chemistry and Nuclear Medicine, Vol. 1. Cortina International, Verona, Italy, 1983.