Aaltonen, T. ., González, A. ., Amerio, S. ., Amidei, D. ., Anastassov, A. ., Annovi, A. ., … CDF, C. . (1969). Search for a Very Light CP-Odd Higgs Boson in Top Quark Decays from pp over ¯ Collisions at sqrt s =1.96  TeV. Physical Review Letters, 107(3), 031801. Retrieved from http://link.aps.org/abstract/PRL/v107/p031801 (Original work published)