Linear-Algebraic Results Associated with Antiferromagnetic Heisenberg Chains. - Man-Duen Choi; Jeffrey S. Rosenthal; Peter Rosenthal (SIAM J. Matrix Anal. Appl., 1993)

On unital qubit channels. - Man-Duen Choi; Chi-Kwong Li (Quantum Inf. Comput., 2023)