Some recent papers:-
A note on singular line graphs
pdf file
On the first passage time of a simple
random walk on a tree
pdf file
On weighted directed graphs
pdf file
On algebraic connectivity of graphs with at most
two points of articulation in each block
pdf file
Identities for the minors of the Laplacian, resistance
and distance matrices
pdf file
Least squares approximation by a tree distance,
pdf file
Recent developments and open problems
in the theory of permanents
pdf file
The distance matrix of a bidirected tree
pdf file
Laplacian spectrum of weakly quasi-threshold
graphs
pdf file
Resistance distance in wheels and fans
pdf file
Inverses of q-distance matrices
of a tree
pdf file
Resistance matrix and q-Laplacian of a
unicyclic graph
pdf file
On Euclidean distance matrices
pdf file
Determinantal divisor rank of an integral
matrix pdf file
A q-analogue of the distance matrix of a tree
pdf file
Determinant of the distance matrix of a tree
with matrix weights pdf file
Energy of a graph is never an odd integer pdf file
Generalized inverses by bordered matrices dvi
file
Outer inverses: Jacobi type identities and nullities of submatrices dvi
file
Resistance distance in graphs dvi file
Resistance matrix of a weighted graph dvi
file
Challenges and frustrations of being a mathematician;
pdf file