https://www.adn40.mx/mexico/imss-tarjeton-jubilados-linea-mva-especial?fbclid=IwAR3ZlH4B_B27wn6PP_pjbZVUTPytRm-22H6iMC4jiuVTzh-sFocM4FIZqZc
https://www.oinkoink.com.mx/noticias/en-que-consiste-la-modalidad-40-del-imss-me-conviene/?fbclid=IwAR24ik770e_5jBd8BuQwsOfnWKHidRtBL9LGcrbvfGHxEP241JHQ5L1n31I
https://idconline.mx/fiscal-contable/2021/02/12/nuevos-requisitos-de-conceptos-en-los-cfdi?fbclid=IwAR3Q3aaCSVPth5kMfV5xbcEGLqBu3oUG2z1-gItF7TT9hSTbM2oVtLw1GqQ