Majumdar, A., Robbins, J., & Zyskin, M. (2009). Tangent unit-vector fields: Nonabelian homotopy invariants and the Dirichlet energy.
Chicago Style (17th ed.) CitationMajumdar, A., J. Robbins, and M. Zyskin. Tangent Unit-vector Fields: Nonabelian Homotopy Invariants and the Dirichlet Energy. 2009.
MLA (9th ed.) CitationMajumdar, A., et al. Tangent Unit-vector Fields: Nonabelian Homotopy Invariants and the Dirichlet Energy. 2009.
Warning: These citations may not always be 100% accurate.