Paolo Maffezzoni Dario D'Amore Evaluating Pulling Effects in Oscillators Due to Small-Signal Injection. 22-31 2009 28 IEEE Trans. on CAD of Integrated Circuits and Systems 1 http://dx.doi.org/10.1109/TCAD.2008.2009142 db/journals/tcad/tcad28.html#MaffezzoniD09