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| Title | Author | Subscribers | Issues | Platform | Active | Language | |
|---|---|---|---|---|---|---|---|
 | Ténis em Português | João Castro | 14 |  |  | ||
 | João Castro (MindfulnessPT) | João Castro | 3 | |  | ||
| Honestojohny | João Castro | 2 | | | ||
 | João’s Substack | João Castro | 2 | | | ||
 | O Substack de João | João Carlos de Castro Leal | 1 | | |