Giansiracusa, J., Giansiracusa, J., & Tillmann, U. (2011). Vanishing of universal characteristic classes for handlebody groups and boundary bundles. Springer/TCMS, 6(1), pp. 103-112.

Giansiracusa, Jeffrey, Jeff Giansiracusa, and Ulrike Tillmann. "Vanishing of Universal Characteristic Classes for Handlebody Groups and Boundary Bundles." Springer/TCMS 6, no. 1 (2011): 103-112.

Giansiracusa, Jeffrey, Jeff Giansiracusa, and Ulrike Tillmann. "Vanishing of Universal Characteristic Classes for Handlebody Groups and Boundary Bundles." Springer/TCMS 6.1 (2011): 103-112.