One easy solution would be a publication pubkey would repost specific events from other people. In fact that reminds me I should support that on narr and noflux, should be easy.
But I've seen that question come up many times and in my mind the ideal solution that composes better is specific publication relays. A publication would have its own custom relay (well, just its website would act as a relay too underneath, like fiatjaf.com does) and everything you could found inside that relay would be part of that publication feed. The events could have a NIP-70 "-" tag to tell all other relays to not rehost them so articles written by someone for a specific publication wouldn't be found in that person's normal feed (or they could choose otherwise, of course).
NIP18 - NIP-18 - Reposts
Read more about the NIP18 on {{appUrl}} - NIP-18 - Reposts
