Oliveira M. B., Neto A. I., Correia C. R., Rial-Hermida M. I., Álvarez-Lorenzo C., and Mano J. F.,  "Superhydrophobic Chips for Cell Spheroids High-Throughput Generation and Drug Screening",  ACS Appl. Mater. Interfaces, vol. 6, issue 12, pp. 9488?9495, doi:10.1021/am5018607, 2014.