1. Berndt, J., Console, S., Olmos, C.: Submanifolds and Holonomy. Chapman & Hall/CRC, Research Notes in Mathematics, vol. 434 (2003)
2. Dajczer M., Tojeiro R.: Submanifolds with nonparallel first normal bundle. Can. Math. Bull. 37(3), 330–337 (1994)
3. Dajczer M., Tojeiro R.: On flat surfaces in space forms. Houston J. Math. 21(2), 319–338 (1995)
4. Dajczer M., do Carmo M.: Local isometric immersions of $${\mathbb{R}^2}$$ into $${\mathbb{R}^4}$$ . J. Reine Angew. Math. 442, 205–219 (1993)
5. Di Scala A.J., Olmos C.: Submanifolds with curvature normals of constant length and the Gauss map. J. Reine Angew. Math. 574, 79–102 (2004)