A bijective proof of Borchardt's identity. Singer, Dan — 2004 The Electronic Journal of Combinatorics [electronic only]
On Catalan trees and the Jacobian conjecture. Singer, Dan — 2001 The Electronic Journal of Combinatorics [electronic only]
A graph-theoretic method for choosing a spanning set for a finite-dimensional vector space, with applications to the Grossman-Larson-Wright module and the Jacobian conjecture. Singer, Dan — 2009 The Electronic Journal of Combinatorics [electronic only]
A bijective proof of Garsia's q -Lagrange inversion theorem. Singer, Dan W. — 1998 The Electronic Journal of Combinatorics [electronic only]