| Geometrical representations in the learning of two-variable functions M Trigueros, R Martínez-Planell Educational studies in mathematics 73, 3-19, 2010 | 200 | 2010 |
| Students’ understanding of the general notion of a function of two variables R Martínez-Planell, M Trigueros Gaisman Educational Studies in Mathematics 81, 365-384, 2012 | 104 | 2012 |
| On students’ understanding of the differential calculus of functions of two variables R Martínez-Planell, MT Gaisman, D McGee The Journal of Mathematical Behavior 38, 57-86, 2015 | 59 | 2015 |
| A study of semiotic registers in the development of the definite integral of functions of two and three variables DL McGee, R Martinez-Planell International Journal of Science and Mathematics Education 12, 883-916, 2014 | 59 | 2014 |
| Students’ conception of infinite series R Martínez-Planell, AC Gonzalez, G DiCristina, V Acevedo Educational Studies in Mathematics 81, 235-249, 2012 | 44 | 2012 |
| Students' understanding of quadratic equations J López, I Robles, R Martínez-Planell International Journal of Mathematical Education in Science and Technology 47 …, 2016 | 40 | 2016 |
| Graphs of functions of two variables: Results from the design of instruction R Martínez-Planell, MT Gaisman International Journal of Mathematical Education in Science and Technology 44 …, 2013 | 37 | 2013 |
| Multivariable calculus results in different countries R Martínez-Planell, M Trigueros ZDM–Mathematics Education 53 (3), 695-707, 2021 | 35 | 2021 |
| The unit circle approach to the construction of the sine and cosine functions and their inverses: An application of APOS theory R Martínez-Planell, AC Delgado The Journal of Mathematical Behavior 43, 111-133, 2016 | 33 | 2016 |
| Students' ideas on functions of two variables: Domain, range, and representations R Martínez-Planell, M Trigueros Gaisman Proceedings of the 31st annual meeting of the North American Chapter of the …, 2009 | 33 | 2009 |
| Using APOS theory as a framework for considering slope understanding C Nagle, R Martínez-Planell, D Moore-Russo The Journal of Mathematical Behavior 54, 100684, 2019 | 30 | 2019 |
| Using cycles of research in APOS: The case of functions of two variables R Martínez-Planell, M Trigueros The Journal of Mathematical Behavior 55, 100687, 2019 | 29 | 2019 |
| Student understanding of the relation between tangent plane and the total differential of two-variable functions MT Gaisman, R Martínez-Planell, D McGee International Journal of Research in Undergraduate Mathematics Education 4 …, 2018 | 28 | 2018 |
| Students’ understanding of the relation between tangent plane and directional derivatives of functions of two variables R Martínez-Planell, MT Gaismán, D McGee The Journal of Mathematical Behavior 46, 13-41, 2017 | 27 | 2017 |
| Students’ understanding of Riemann sums for integrals of functions of two variables R Martínez-Planell, M Trigueros The Journal of Mathematical Behavior 59, 100791, 2020 | 24 | 2020 |
| On students’ understanding of implicit differentiation based on APOS theory V Borji, R Martínez-Planell Educational Studies in Mathematics 105 (2), 163-179, 2020 | 23 | 2020 |
| Las funciones de dos variables: análisis mediante los resultados del diálogo entre la teoría APOS y la TAD M Trigueros, R Martínez-Planell Enseñanza de las ciencias: revista de investigación y experiencias …, 2015 | 19* | 2015 |
| Visualization and abstraction: Geometric representation of functions of two variables M Trigueros, R Martínez-Planell Proceedings of the 29th Annual Conference of the North American Chapter of …, 2007 | 19 | 2007 |
| How are graphs of two variable functions taught M Trigueros, R Martínez-Planell Proceedings of the 33rd Annual Conference of the North America Chapter of …, 2011 | 14 | 2011 |
| Making implicit multivariable calculus representations explicit: A clinical study D McGee, D Moore-Russo, R Martinez-Planell Primus 25 (6), 529-541, 2015 | 13 | 2015 |
