C. Wasshuber, H. Kosina, S. Selberherr: "Single-Electron Memories"; VLSI Design, 8 (1998), 1-4; S. 219 - 223.
http://dx.doi.org/10.1155/1998/83017
http://www.iue.tuwien.ac.at/pdf/ib_1998/JB1998_Wasshuber_2.pdf