चक्रवर्ती उत्‍पल. “गणित, पाठ्यपुस्तक और शिक्षक”. Voices of Teachers and Teacher Educators 5, no. 1 (December 31, 2016): p. 32–34. Accessed June 16, 2025. http://ejournals.ncert.gov.in/index.php/vtte/article/view/137.