Buckling and layering transitions in confined colloidsD. K. Satapathy, K. Nygård, O. Bunk, K. Jefimovs, E. Perret, A. Diaz, F. Pfeiffer, C. David and J. F. van der VeenEPL, 87 3 (2009) 34001DOI: https://doi.org/10.1209/0295-5075/87/34001