Geodesic
A Class of Normal (0, 1)-Matrices
Canadian journal of mathematics, Tome 25 (1973) no. 3, pp. 621-626

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If A is a real normal matrix At (the transpose of A) is a real polynomial in A. We study here those normal (0, 1)-matrices A with constant row sums which have At a polynomial of degree two in A. 
Bridges, W. G. A Class of Normal (0, 1)-Matrices. Canadian journal of mathematics, Tome 25 (1973) no. 3, pp. 621-626. doi: 10.4153/CJM-1973-063-6
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