Buzdar, Saeed Ahmad, M. Afzal, and Andrew Todd- Pokropek. 2010. “COMPARISON OF PENCIL BEAM AND COLLAPSED CONE ALGORITHMS, IN RADIOTHERAPY TREATMENT PLANNING FOR 6 AND 10 MV PHOTON”. Journal of Ayub Medical College Abbottabad 22 (3):152-54. https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/2890.