1. Bahy-El-Dien A., Wood J.C.: The explicit construction of all harmonic two-spheres in G 2(R n ). J. Reine u. Angew. Math. 398, 36–66 (1989)
2. Bahy-El-Dien A., Wood J.C.: The explicit construction of all harmonic two-spheres in quaternionic projective spaces. Proc. Lond. Math. Soc. 62(3), 202–224 (1991)
3. Bolton J., Pedit F., Woodward L.M.: Minimal surfaces and the affine Toda field model. J. Reine Angew. Math. 459, 119–150 (1995)
4. Bolton, J., Woodward, L.M.: The affine Toda equations and minimal surfaces. In: Harmonic maps and integrable systems, pp. 59–82. Vieweg, Braunschweig (1994). See http://www1.maths.leeds.ac.uk/Pure/staff/wood/FordyWood/contents.html for a downloadable version
5. Burstall F.E.: A twistor description of harmonic maps of a 2-sphere into a Grassmannian. Math. Ann. 274, 61–74 (1986)