- The Concept of Lamina–Pedicle Perpendicularity: Part 2: Thoracic Spine
- Tarek Anwar Elfiky, Nirmal Dhananjay Patil, Keith DK Luk, Mohamed Esam Faheem, Dino Samartzis
- Asian Spine J. 2021;15(2):252-260. Published online June 12, 2020
- The Concept of Lamina–Pedicle Perpendicularity: Part 1. Lumbar Spine
- Tarek Anwar Elfiky, Nirmal Dhananjay Patil, Keith DK Luk, Mohamed Esam Faheem, Dino Samartzis
- Asian Spine J. 2021;15(1):81-88. Published online February 14, 2020
- Endplate Changes with Polyetheretherketone Cages in Posterior Lumbar Interbody Fusion
- Tarek Anwar Elfiky, Nirmal Dhananjay Patil, Yasser Allam, Raafat Ragab
- Asian Spine J. 2020;14(2):229-237. Published online November 12, 2019