Sharma, S.D., Sunil Dutt Sharma, S.K. Bhardwaj, P.S. Chauhan, and Ashu Chandel. 2010. “Regression Analysis of Apple Yield on the Basis of Some Morphological and Nutritional Parameters”. Indian Journal of Horticulture 67 (Special Issue):75-78. https://journal.iahs.org.in/index.php/ijh/article/view/2132.