@article{DMGT_2020_40_2_a5,
     author = {Briffa, Johann A. and Sciriha, Irene},
     title = {On the {Displacement} of {Eigenvalues} {When} {Removing} a {Twin} {Vertex}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {435--450},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2020_40_2_a5/}
}