Give a look to the manual to start
 Garnett,M.J. et al. (2012) Systematic identification of genomic markers of drug sensitivity in cancer cells. Nature, 483, 570–575.
 Subramanian,A. et al. (2005) Gene set enrichment analysis: a knowledge-based approach for interpreting genome-wide expression profiles. Proceedings of the National Academy of Sciences of the United States of America, 102, 15545.
 Lamb,J. et al. (2006) The Connectivity Map: using gene-expression signatures to connect small molecules, genes, and disease. Science, 313, 1929.
 Iorio,F. et al. (2013) Transcriptional data: a new gateway to drug repositioning? Drug Discovery Today, 18, 350–357.