| Word order variation: a constrained-based approach J Costa LOT Utrecht, 1998 | 348 | 1998 |
| Subject positions and interfaces: the case of European Portuguese J Costa Mouton de Gruyter, 2004 | 181 | 2004 |
| A novel argument for the universality of parsing principles N Grillo, J Costa Cognition 133 (1), 156-187, 2014 | 127 | 2014 |
| A falar como os bebés: o desenvolvimento linguístico das crianças J Costa, AL Santos | 102 | 2003 |
| A cross-linguistic study of the acquisition of clitic and pronoun production S Varlokosta, A Belletti, J Costa, N Friedmann, A Gavarró, KK Grohmann, ... Language acquisition 23 (1), 1-26, 2016 | 99 | 2016 |
| A cross-linguistic study of the acquisition of clitic and pronoun production A Belletti, J Costa, N Friedmann, A Gavarró, KK Grohmann, MT Guasti, ... Language Acquisition, 2015 | 99* | 2015 |
| Clitic omission, null objects or both in the acquisition of European Portuguese? J Costa, M Lobo AMSTERDAM STUDIES IN THE THEORY AND HISTORY OF LINGUISTIC SCIENCE SERIES 4 …, 2007 | 95 | 2007 |
| Subject–object asymmetries in the acquisition of Portuguese relative clauses: Adults vs. children J Costa, M Lobo, C Silva Lingua 121 (6), 1083-1100, 2011 | 83 | 2011 |
| A multifactorial approach to adverb placement: assumptions, facts, and problems J Costa Lingua 114 (6), 711-753, 2004 | 79 | 2004 |
| External subjects in two varieties of Portuguese J Costa, C Galves BEYSSADE, C.; BOK-BENNEMA, R; DRIJKONINGEN, F, 109-125, 2002 | 79 | 2002 |
| The emergence of unmarked word order J Costa Optimality-theoretic syntax, 171-204, 2001 | 77 | 2001 |
| Minimizando a estrutura: uma análise unificada das construções de clivagem em português J Costa, I Duarte Actas do XVI Encontro Nacional da Associação Portuguesa de Linguística, 627-638, 2001 | 76 | 2001 |
| Nominal and verbal agreement in Portuguese J Costa, MC Figueiredo Silva Studies on agreement 86, 25, 2006 | 69 | 2006 |
| Word order variation J Costa Netherlands Graduate School of Linguistics, 1998 | 66 | 1998 |
| Guião de implementação do Programa de Português do ensino básico–Conhecimento explícito da língua J Costa, AC Cabral, A Santiago, F Viegas Lisboa: Ministério da Educação–DGIDC, 2011 | 61 | 2011 |
| The child heard a coordinated sentence and wondered: On children's difficulty in understanding coordination and relative clauses with crossing dependencies N Friedmann, J Costa Lingua 120 (6), 1502-1515, 2010 | 61 | 2010 |
| A aquisição de clíticos em PE: omissão de clíticos ou objecto nulo J Costa, M Lobo XXI Encontro Nacional da APL. Textos Seleccionados, 285-293, 2006 | 60 | 2006 |
| Conhecimento gramatical à saída do Ensino Secundário: estado actual e consequências na relação com leitura, escrita e oralidade J Costa Actas da Conferência Internacional sobre o Ensino do Português. Lisboa …, 2008 | 59 | 2008 |
| Word order and discourse-configurationality in European Portuguese J Costa Portuguese syntax: New comparative studies, 94-115, 2000 | 59 | 2000 |
| On focus movement in European Portuguese J Costa, AM Martins Walter de Gruyter GmbH & Co. KG 23 (2), 217-245, 2011 | 56 | 2011 |
