https://en.wikipedia.org/wiki/Promoci%C3%B3n_fantasma
https://en.wikipedia.org/wiki/Promociones_Guti%C3%A9rrez_1st_Anniversary_Show
https://en.wikipedia.org/wiki/Promotion_(chess)
https://en.wikipedia.org/wiki/Promotion_to_the_2._Bundesliga
https://en.wikipedia.org/wiki/Promotional_model