The GCTx format and cmap{Py, R, M, J} packages: resources for optimized storage and integrated traversal of annotated dense matrices. - Oana M. Enache; David L. Lahr; Ted E. Natoli; Lev Litichevskiy; David Wadden; Corey Flynn; Joshua Gould; Jacob K. Asiedu; Rajiv Narayan; Aravind Subramanian (Bioinform., 2019)