https://www.drupaleasy.com/blogs/ultimike/2016/04/drupal-6-drupal-81x-custom-content-migration

https://thinkshout.com/blog/2017/05/skipping-a-version-migrating-from-drupal-6-to-drupal-8-with-drupal-migrate/

https://www.drupal.org/docs/8/upgrade/known-issues-when-upgrading-from-drupal-6-or-7-to-drupal-8

https://drupal.stackexchange.com/questions/164612/how-do-i-remove-a-configuration-object-from-the-active-configuration

https://www.metaltoad.com/blog/drupal-8-migrations-part-3-migrating-taxonomies-drupal-7

https://www.sitepoint.com/your-first-drupal-8-migration/

https://evolvingweb.ca/blog/drupal-8-migration-migrating-taxonomy-term-references-part-2

[text to taxonomy term](http://boylesoftware.com/blog/drupal-8-migration-taxonomy-term-lookups/)

[Upgrading Drupal 6 and i18n Content Translation to Drupal 8](https://www.dunix-data.de/blog/upgrading_drupal_6_and_i18n_content_translation_to_drupal_8)

[Migrating Drupal 7 File Entities to Drupal 8 Media Entities](https://www.previousnext.com.au/blog/migrating-drupal-7-file-entities-drupal-8-media-entities)

[D6 Taxonomy Term Reference Field is not migrated to D8 Field](https://www.drupal.org/node/2884240)

[Migrer un site Drupal 6 ou Drupal 7 vers Drupal 8](https://www.drupalfacile.org/sites/drupalfacile/files/blog/2016/06/dcnantes2016-migrerd6d7versd8.pdf)
