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- [5] LEARNING GERMAN AS A SECOND FOREIGN LANGUAGE: IS GRAMMAR SO DIFFICULT? 5TH INTERNATIONAL CONFERENCE ON EDUCATION AND SOCIAL SCIENCES (INTCESS 2018), 2018, : 520 - 523
- [10] CONTRASTIVE GRAMMAR IN LEARNING THE MOTHER TONGUE QUECHUA AND SECOND LANGUAGE SPANISH PROMETEICA-REVISTA DE FILOSOFIA Y CIENCIAS, 2023, (28): : 110 - 123