Adhesion-induced instabilities and pattern formation in thin films of elastomers and gels Manoj K. Chaudhury, Aditi Chakrabarti and Animangsu Ghatak Eur. Phys. J. E, 38 7 (2015) 82 Published online: 31 July 2015 DOI: 10.1140/epje/i2015-15082-7