Add DOI registered by other registration agencies than CrossRef to "Citation Trail".
It seems that recent "Citation trail" is referring DOI registered by CrossRef.
But there are many publishers and universities in the world which use DOI registered by other registration agencies like JaLC, KISTI, CNKI and so on. It would be beneficial for Summon users in the world if it could be realized.
Keita Ohwada commented
Recently I attended a seminar held by JaLC. And I heard that they are positive about providing their data to third party.