Blumenhagen, R., & Weigand, T. (2007). Massless spectra of three generation U(N) heterotic string vacua. Journal of high energy physics, 05, . https://doi.org/10.1088/1126-6708/2007/05/041
Chicago Style (17th ed.) CitationBlumenhagen, Ralph, and Timo Weigand. "Massless Spectra of Three Generation U(N) Heterotic String Vacua." Journal of High Energy Physics 05 (2007). https://doi.org/10.1088/1126-6708/2007/05/041.
MLA (9th ed.) CitationBlumenhagen, Ralph, and Timo Weigand. "Massless Spectra of Three Generation U(N) Heterotic String Vacua." Journal of High Energy Physics, 05, 2007, https://doi.org/10.1088/1126-6708/2007/05/041.
Warning: These citations may not always be 100% accurate.