APA (7th ed.) Citation

Bijnens, J., & Wetterich, C. (1987). Hierarchical structure of fermion masses and mixings. Physics letters, 199(4), . https://doi.org/10.1016/0370-2693(87)91621-2

Chicago Style (17th ed.) Citation

Bijnens, Johan, and Christof Wetterich. "Hierarchical Structure of Fermion Masses and Mixings." Physics Letters 199, no. 4 (1987). https://doi.org/10.1016/0370-2693(87)91621-2.

MLA (9th ed.) Citation

Bijnens, Johan, and Christof Wetterich. "Hierarchical Structure of Fermion Masses and Mixings." Physics Letters, vol. 199, no. 4, 1987, https://doi.org/10.1016/0370-2693(87)91621-2.