“…Thus, the ordinary Laplacian based protocols can be adopted to solve the flocking problem. The flocking problem has also been widely investigated from single-integrator kinematics to double-integrator dynamics, from timely communication to delayed communication, from fixed topology to switching topology, and from without robustness to robustness (Blondel et al, 2005;Moshtagh and Jadbabaie, 2007;Li et al, 2008;He et al, 2012;Wang and Peng, 2012;Martin, 2014;Semnani and Basir, 2015).…”