"Shuhei Amakawa,Ryotaro Sugimoto,Korkut Kaan Tokgoz,Sangyeop Lee,Hiroyuki Ito,Ryoko Kishikawa","Signal-Flow-Graph Analysis of Weakly Nonlinear Microwave Circuits around a Large-Signal Operating Point",,"IEEE Transactions on Microwave Theory and Techniques",,,,,2023,Sept.