Hélein, F. (2002). Harmonic maps, conservation laws, and moving frames (2nd ed.). Cambridge University Press.
Chicago-čujuhus (17. p.)Hélein, Frédéric. Harmonic Maps, Conservation Laws, and Moving Frames. 2nd ed. Cambridge ; New York: Cambridge University Press, 2002.
MLA-čujuhus (9. p.)Hélein, Frédéric. Harmonic Maps, Conservation Laws, and Moving Frames. 2nd ed. Cambridge University Press, 2002.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.