2.4.2.1. Video: T vs D | English Pronunciation Lesson - YouTube - https://www.youtube.com/watch?v=0z1gT2g3w5s

2.4.2.2. Video: Minimal Pairs: /t/ vs /d/ - YouTube - https://www.youtube.com/watch?v=zvM3TUo4r2o

2.4.2.3. Article: Minimal Pair /t/ and /d/ | Learn English - https://www.englishclub.com/pronunciation/minimal-pairs-t-d.php

2.4.2.4. Article: English Pronunciation: /t/ vs /d/ - Pronunciation Studio - https://pronunciationstudio.com/t-d/