Himanshu Thapliyal Nagarajan Ranganathan Conservative QCA Gate (CQCA) for Designing Concurrently Testable Molecular QCA Circuits. 511-516 2009 VLSI Design http://dx.doi.org/10.1109/VLSI.Design.2009.75 conf/vlsid/2009 db/conf/vlsid/vlsid2009.html#ThapliyalR09