Synthesis of Phase-locked Loop System Structure with Adaptation Based on Combined-maximum PrincipleAndrey Aleksandrovich Kostoglotov, Sergey Valerievich Lazarenko, Dmitriy Sergeevich Andrashitov and Igor Vladimirovich DeryabkinMATEC Web Conf., 77 (2016) 15002DOI: https://doi.org/10.1051/matecconf/20167715002