ELA articles which reference this paper are

Jiemei Zhao; Changjiang Bu
Group inverse for the block matrix with two identical subblocks over skew fields,
Electron. J. Linear Algebra 21 (2010/2011), 63-75.

Changhang Hu, Lizhu Sun, Jiang Zhou and Yimin Wei
A note on block representations of the group inverse of Laplacian matrices.
Electron. J. Linear Algebra 23 (2012) pp. 866-876.