A. Tamagnini:
Planar Clusters
(Phd Thesis) 2016

E. Paolini, A. Tamagnini:
Minimal cluster computation for four planar regions with the same area
Geometric Flows Vol. 3, N. 1, p. 90--96, 2018

E. Paolini, A. Tamagnini:
Minimal clusters of four planar regions with the same area
ESAIM: COCV Vol. 24, N. 3, p. 1303-1331, 2018