Siegfried K. Wiedmann, Horst H. Berger (1972). “Merged-transistor logic (MTL)-a low-cost bipolar logic concept”. IEEE Journal of Solid-State Circuits7 (5): 340–346. Bibcode: 1972IJSSC...7..340B. doi:10.1109/JSSC.1972.1052890.
Jarrett, Robert (1978). “A monolithic speed-control micro-system for automotive applications”. 1978 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. IEEE. pp. 46–47. doi:10.1109/ISSCC.1978.1155757