1. Clinical amplitude of accommodation in children between 5 and 10 Years of Age;Optometry and Vision Development,2012
2. Amplitude of accommodation in schoolchildren;Current Eye Research,2017
3. Duclos, LF. 1989. Common Knowledge Comparison of optometric extension program’s test # 19 to Hofstetter’s formulas, Pacific University. Available at: https://commons.pacificu.edu/opt/876.
4. Accommodation in school childiren. Aged five, six, seven, and eight years;American Journal of Ophthalmology,1961