Hélein, F. (2002). Harmonic maps, conservation laws, and moving frames (2nd ed.). Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Hélein, Frédéric. Harmonic Maps, Conservation Laws, and Moving Frames. 2nd ed. Cambridge ; New York: Cambridge University Press, 2002.
Lua MLA (9ú heag.)Hélein, Frédéric. Harmonic Maps, Conservation Laws, and Moving Frames. 2nd ed. Cambridge University Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.