/sepa-php

http://www.sepa-info.es/main/content/validadores-sepa-xml-20022-gratuito

https://www.europeanpaymentscouncil.eu/what-we-do/sepa-payment-schemes/sepa-credit-transfer/sepa-credit-transfer-rulebook-and

https://gocardless.com/guides/sepa/submitting-sepa-messages/

https://docs.oracle.com/cd/E16582_01/doc.91/e15104/fields_sepa_pay_file_appx.htm#EOAEL00519

https://docs.oracle.com/cd/E16582_01/doc.91/e15104/sepa_dir_debit_xml_appx.htm#EOAEL2778

https://www.swift.com/node/16726

https://www.febelfin.be/sites/default/files/2019-04/standard-credit_transfer-xml-v32-en_0.pdf

https://www.bbva.es/finanzas-vistazo/ef/cuentas/codigo-swift-bic.html

https://www.mypos.eu/en/sepa-and-swift-transfers-what-is-the-difference

https://s1.aebanca.es/wp-content/uploads/2019/07/folleto.-rdenes-en-formato-iso-20022-para-emisin-de-adeudos-directos-sepa-esquema-bsico-versin-noviembre-2019.pdf

https://empresas.bankinter.com/www2/empresas/es/utilidades/ficheros/formatos_fichero

https://www.bbva.es/estaticos/mult/SEPA-preguntas-frecuentes.pdf