Links-and-resources.md

@@ -61,3 +61,6 @@ with [Swagger JSON](https://raw.githubusercontent.com/OpenBankingUK/read-write-a
 
 [Java API for ISO20022](https://tools20022.com/apidocs/overview-summary.html)
 - Set of classes with ISO 20022 messages' definitions.
+
+[SEPA Implementation Guildelines](https://www.europeanpaymentscouncil.eu/search?kb%5B0%5D=authored_on_by_year%3A2018&kb%5B1%5D=tags%3A141&kb%5B2%5D=type%3A86&node=1126)
+- Information about mandatory endpoints, message formats etc.
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