Hong-bo Guo, Xin-guo Liu, Wei-guo Wang. The block numerical range of matrix polynomials. Applied Mathematics and Computation, 211(2):265-283, 2009. [doi]
@article{GuoLW09-2,
title = {The block numerical range of matrix polynomials},
author = {Hong-bo Guo and Xin-guo Liu and Wei-guo Wang},
year = {2009},
doi = {10.1016/j.amc.2009.01.070},
url = {http://dx.doi.org/10.1016/j.amc.2009.01.070},
researchr = {https://researchr.org/publication/GuoLW09-2},
cites = {0},
citedby = {0},
journal = {Applied Mathematics and Computation},
volume = {211},
number = {2},
pages = {265-283},
}