Das, Mousumi, Utpal Kumar Biswas, and Arun Kumar. 2015. “24 Hours Urinary Hydroxyproline - A Noninvasive, Cost-Effective and Early Biochemical Marker Which May Be Used to Screen the Osteoporotic Lesion in Postmenopausal Women”. Asian Journal of Medical Sciences 6 (4):21-24. https://nepjol.info./index.php/AJMS/article/view/11853.