@inbook{inbookfaf22708,
title   = {Equivariant bifurcation in geometric variational problems},
author = {Bettiol, Renato Ghini and Piccione, Paolo and Siciliano, Gaetano},
year = {2014},
doi = {10.1007/978-3-319-04214-5_6},
publisher = {Springer},
journal   = {Analysis and topology in nonlinear differential equations: a tribute to Bernhard Ruf on the occasion of his 60th birthday}
}