APA (7th ed.) Citation

Birkel, M., & Sarkar, S. (1998). Extremely high energy cosmic rays from relic particle decays.

Chicago Style (17th ed.) Citation

Birkel, M., and S. Sarkar. Extremely High Energy Cosmic Rays from Relic Particle Decays. 1998.

MLA (9th ed.) Citation

Birkel, M., and S. Sarkar. Extremely High Energy Cosmic Rays from Relic Particle Decays. 1998.

Warning: These citations may not always be 100% accurate.