| Cartas e projecções cartográficas (3rd Edition) JA Gaspar | 95 | 2005 |
| Dicionário de ciências cartográficas (2nd Edition) JA Gaspar | 57 | 2008 |
| From the portolan chart of the mediterranean to the latitude chart of the atlantic (PhD dissertation) JFFA Gaspar Universidade Nova de Lisboa, 2010 | 40* | 2010 |
| Squaring the circle: how Mercator constructed his projection in 1569 JA Gaspar, H Leitão Imago Mundi 66 (1), 1-24, 2014 | 36 | 2014 |
| Blunders, errors and entanglements: scrutinizing the Cantino planisphere with a cartometric eye JA Gaspar Imago mundi 64 (2), 181-200, 2012 | 31 | 2012 |
| What is a nautical chart, really? Uncovering the geometry of early modern nautical charts JA Gaspar, H Leitão Journal of Cultural Heritage 29, 130-136, 2018 | 24 | 2018 |
| Globes, rhumb tables, and the pre-history of the Mercator projection H Leitão, JA Gaspar Imago Mundi 66 (2), 180-195, 2014 | 23 | 2014 |
| 360o ciência descoberta H de Sousa Leitão, TN de Carvalho, JA Gaspar, AS de Mora Fundação Calouste Gulbenkian, 2013 | 20 | 2013 |
| The myth of the square chart JA Gaspar e-Perimetron 2 (2), 66-79, 2007 | 20 | 2007 |
| From the Portolan Chart to the Latitude Chart: the Silent Cartographic Revolution JA Gaspar Cartographie et Géomatique, 2013 | 19* | 2013 |
| Dead reckoning and magnetic declination: unveiling the mystery of portolan charts JA Gaspar e-Perimetron 3 (4), 191-203, 2008 | 17 | 2008 |
| Early modern nautical charts and maps: working through different cartographic paradigms JA Gaspar, H Leitão Journal of early modern history 23 (1), 1-28, 2019 | 13 | 2019 |
| Luís Teixeira, c. 1585: the earliest known chart with isogonic lines JA Gaspar, H Leitão Imago Mundi 70 (2), 221-228, 2018 | 10 | 2018 |
| Using Empirical Map Projections for Modeling Early Nautical Charts JA Gaspar Advances in Cartography and GIScience. Selection from ICC 2011, Paris, Anne …, 2011 | 9 | 2011 |
| Kunstmann III: The oldest known nautical chart incorporating latitudes GC McIntosh, JA Gaspar Imago Mundi 73 (2), 162-178, 2021 | 7 | 2021 |
| Revisiting the mercator world map of 1569: an assessment of navigational accuracy JA Gaspar The Journal of Navigation 69 (6), 1183-1196, 2016 | 7 | 2016 |
| Revisitando a cartografia naútica portuguesa antiga do Atlântico: uma análise quantitativa JA Gaspar III SIMPÓSIO LUSO-BRASILEIRO DE CARTOGRAFIA HISTÓRICA. Ouro Preto, 2009 | 7 | 2009 |
| The representation of the West Indies in early Iberian cartography: a cartometric approach JA Gaspar Terrae Incognitae 47 (1), 10-32, 2015 | 6 | 2015 |
| Qual o sistema de projecção das cartas de marear JA Gaspar Anais do Clube Militar Naval 135 (4-6), 313-343, 2005 | 6 | 2005 |
| The Liber de existencia riveriarum (c.1200) and the Birth of Nautical Cartography JA Gaspar Imago Mundi 71 (1), 1-21, 2019 | 5 | 2019 |
