Ndifon, Wilfred, Ned Wingreen, and Simon Levin. (2009) 2009. “Differential Neutralization Efficiency of Hemagglutinin Epitopes, Antibody Interference, and the Design of Influenza Vaccines.”. Proc Natl Acad Sci U S A 106 (21): 8701-6. doi:10.1073/pnas.0903427106.

Nara, Peter, Gregory Tobin, Ray Chaudhuri, Jessie Trujillo, George Lin, Michael Cho, Simon Levin, Wilfred Ndifon, and Ned Wingreen. (2010) 2010. “How Can Vaccines Against Influenza and Other Viral Diseases Be Made More Effective?”. PLoS Biol 8 (12): e1000571. doi:10.1371/journal.pbio.1000571.