1. A.V. Manohar, Nucl. Phys. B 248, 19 (1984).
2. L.C. Biedenharn, Y. Dothan, (1984), Print-84-1039 (DUKE).
3. M. Chemtob, Nucl. Phys. B 256, 600 (1985).
4. M. Praszałowicz, Su(3) skyrmion, in Skyrmions and Anomalies, edited by M. Jezabek, M. Prasałowicz (World Scientific, 1987) p. 112.
5. H. Walliser, An extension of the standard Skyrme model, in Baryons as Skyrme Solitons, edited by G. Holzwarth (World Scientific, 1994) p. 247.