This this the content of the first blog for the series: What is the status of the OSPF neighbors of your devices?!! in Cisco Community
Here the link: https://community.cisco.com/t5/networking-blogs/what-is-the-status-of-the-ospf-neighbors-of-your-devices/ba-p/4923530
The French version:https://community.cisco.com/t5/discussions-de-routage-et-commutation/quel-est-l-%C3%A9tat-des-voisins-ospf-de-vos-p%C3%A9riph%C3%A9riques-r%C3%A9seau/td-p/4923547
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