Abazov, V. M., Abbott, B., Abdesselam, A., Šimák, V., Soustružník, K., Krivková, P., Kupčo, A. Search for first-generation scalar and vector leptoquarks. Physical Review. D. 2001, 64(9), 092004/1-092004/21. ISSN 0556-2821.