Coppee, JL., & Vandewiele, F. (1988). Silo Isolation Technique - a Study of Active and Parasitic Device Characteristics With Semi-recessed and Fully-recessed Field Oxides. Solid-State Electronics, 31(5), 887-891. https://doi.org/10.1016/0038-1101(88)90042-1 (Original work published 1988)