Graphs with four distinct Laplacian eigenvalues

Spectra of graphs: theory and application

Gordon J. Savage, S. Toida · Journal of the Franklin Institute · 1981 · 755 citations

Natural Sciences, Mathematics, Spectroscopy +5

Laplacian graph eigenvectors

Russell Merris · Linear Algebra and its Applications · 1998 · 264 citations

Regular graphs with four eigenvalues

Edwin van Dam · Linear Algebra and its Applications · 1995 · 112 citations

Natural Sciences, Visualization, Dynamical Systems +7

Nonregular Graphs with Three Eigenvalues

Edwin van Dam · Journal of Combinatorial Theory Series B · 1998 · 96 citations

Natural Sciences, Visualization, Complex Systems +5

An improved upper bound for Laplacian graph eigenvalues

Kinkar Chandra Das · Linear Algebra and its Applications · 2003 · 87 citations

Natural Sciences, Computer Science, Optimization +10