El-Azab, S., E. Alqalshy, K. A. El-Rahman, A. Hussein, A. Ibrahim, M. A. Alazzazi, A. S. Abdel-Wahab, H. M. Mahmoud, W. B. Abdelhameed, and A. E. A. E. M. Esmail. “Immunohistochemical Analysis of CD34 and PCNA Expression in Salivary and Laryngeal Adenoid Cystic Carcinoma”. International Journal of Health Sciences, vol. 5, no. S2, Dec. 2021, pp. 501-13, doi:10.53730/ijhs.v5nS2.12761.