2012*
‘The Kaṭapayādi System of Numerical Notation and its Spread outside Kerala,’ Revue d’histoire des mathématiques, 18.1 (2012) 37-66.

2012**
‘The Gurmukhi Astrolabe of the Maharaja of Patiala,’ Indian Journal of History of Science, 47.1 (2012) 63-92.

2012**
‘The Dhruvabhrama-Yantra of Padmanābha,’ Saṃktavimarśaḥ, Journal of Rashtriya Sanskrit Samsthan, World Sanskrit Conference Special, 6 (2012) 321-343.

2012
‘Avid Mathematician and the Spurned Wife: A Motif from the Dhammillahiṃḍī’ in: Chikafumi Watanabe, Michele Desmarais & Yoshichika Honda (ed), Saṃskta-sādhutā: Goodness of Sanskrit: Studies in Honour of Professor Ashok N. Aklujkar, New Delhi, pp. 446-455.

2012*
‘A Jain Assayer at the Sulṭān’s Mint’ in: Jayandra Soni (ed), Jaina Studies: Proceedings of the DOT 2010 Panel in Marburg, Germany, New Delhi, pp. 7-32.

2011**
(with Mohammad Bagheri), ‘Shabnumā-wa-Rūznumā: A Rare Astronomical Instrument extant in two Specimens,’ Tarikh-e Elm, 9 (2011) 21-48.

2011**
‘Yantrarāja at Edinburgh: On a Sanskrit Astrolabe made for Maṇirāma in AD 1644’ in: S. R. Sarma & Gyula Wojtilla (ed), Scientific Literature in Sanskrit, (Papers of the 13th World Sanskrit Conference, Section 8), Delhi, pp. 77-110.

2011**
‘A Bilingual Astrolabe from the Court of Jahāngīr,’ Indian Historical Review, 38.1 (June 2011) 77-117.

2011*
‘Sudoku-yantra,’ Indian Journal of History of Science, 46.1 (2011) 155-158.

2011*
‘Mathematical Literature in the Regional Languages of India’ in: B. S. Yadav & Man Mohan (ed), Ancient Indian Leaps into Mathematics, New York 2011, pp. 201-211.

2010**
‘The Makers, Designers and Patrons of Sanskrit Astronomical Instruments: An Alphabetical Directory of Names and Related Inscriptions,’ Journal of the Oriental Institute, 60.1-2 (Sept-Dec 2010) 75-108.

2010*
‘Nandigrāma of Gaṇeśa Daivajña,’ Indian Journal of History of Science, 45 (2010) 569-574.

2010*
‘The Date of Āryabhaṭa: Refutation of V. Lakshmikantham’s untenable View,’ Indian Journal of History of Science, 45 (2010) 411-417.

2009*
‘On the Rationale of the Maxim aṅkānāṃ vāmato gatiḥ,’ Gaṇita Bhāratī, 31 (2009) 65-86.

2009*
‘Early Transmission of Indian Mathematics’ in: George Gheverghese Joseph (ed), Kerala Mathematics: History and its Possible Transmission to Europe, Delhi 2009, pp. 205-231.

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