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.

2009*
‘Persian-Sanskrit Lexica and the Dissemination of Islamic Astronomy and Astrology in India’ in: Gherardo Gnoli & Antonio Panaino (ed), KAYD: Studies in History of Mathematics, Astronomy and Astrology in Memory of David Pingree (Serie Orientale Roma, CII), Rome 2009, pp. 129-150.

2008**
‘Cataloguing Indian Astronomical Instruments’ in: Kalyan Kumar Chakravarty (ed), Tattvabodha: Essays from the Lecture Series of the National Mission for Manuscripts, vol. II, New Delhi 2008, pp. 141-157.

2008*
‘On the Life and Works of Rāmacandra Vājapeyin’ in: Radhavallabh Tripathi (ed), Śrutimahatī: Glory of Sanskrit Tradition: Professor Ram Karan Sharma Felicitation Volume, New Delhi 2008, vol. 2, pp. 645-661.

2008**
‘Indian Astronomical Instruments in German Collections,’ XXX. Deutscher Orientalistentag, Freiburg, 24.-28. September 2007. Ausgewählte Vorträge, hrsg. im Auftrag der DMG von Rainer Brunner et al. Online-Publikation, Februar 2008.

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