A comparison of linear handset power amplifiers in different bipolar technologies. - Keith Nellis; Peter J. Zampardi (IEEE J. Solid State Circuits, 2004)

Practical limits of coherent receivers for unamplified 100Gb/s applications. - Bo Zhang; Ted Schmidt; Christian Malouin; Jason O'Neil; Roberto Marcoccia; Tom Broekaert; Zbigniew Nosal; Keith Nellis (OFC/NFOEC, 2013)