1. ScienceDirect Study [The Effect of Ergonomic Latex Pillow on Head and Neck Posture and Muscle Endurance]

https://www.sciencedirect.com/science/article/abs/pii/S1556370720300481

2. National Center for Biotechnology Information Study [Cervical Radiculopathy]

https://www.ncbi.nlm.nih.gov/books/NBK441828/

3. PubMed Central Study [The Effect of Different Pillow Heights on the Parameters of Cervicothoracic Spine Segments]

https://pmc.ncbi.nlm.nih.gov/articles/PMC4623167/

4. PubMed Central Study [Effect of pillow height on the biomechanics of the head-neck complex: investigation of the cranio-cervical pressure and cervical spine alignment]

https://pmc.ncbi.nlm.nih.gov/articles/PMC5012320/