1. See the review by C.G. Callan Jr., J.A. Harvey and A. Strominger, Supersymmetric String Solitons, in: String Theory and Quantum Gravity '91, eds. J. Harvey, R. Iengo, K.S. Narain, S. Randjbar-Daemi and H. Verlinde (World Scientific) and references therein.
2. Quark structure and octonions
3. Spherically symmetric solutions of gauge theories in eight dimensions