Matveev, Sergei Max Planck Institute for Mathematics, Max Planck Society;
Polyak, Michael Max Planck Institute for Mathematics, Max Planck Society;
Matveev, S., & Polyak, M. (2009). A simple formula for the Casson-Walker invariant. Journal of Knot Theory and its Ramifications, 18(6), 841-864. doi:10.1142/S021821650900721X.