Yang, Ping, and Yao-Lin Jiang. “H2 Optimal Model Reduction of Coupled Systems on the Grassmann Manifold”. Mathematical Modelling and Analysis 22, no. 6 (November 27, 2017): 785-808. Accessed November 25, 2024. https://jcem.vgtu.lt/index.php/MMA/article/view/927.