Publications by Ningbo Li 2023 -- Ningbo Li, Pablo Borja, Jacquelien M. A. Scherpen, Arjan van der Schaft, Robert MahonyPassivity-Based Trajectory Tracking and Formation Control of Nonholonomic Wheeled Robots Without Velocity Measurements 2021 -- Ningbo Li, Pablo Borja, Arjan van der Schaft, Jacquelien M.A. Scherpen, Liangming ChenAngle formation of double integrator with bearing and velocity information