Which Beatles songs reference other Beatles songs?

Sorry if this is a common question here. I'll delete if it it. But I was just listening to I Am the Walrus and it references Lucy in the Sky With Diamonds. Another obvious one is the reference to She Loves You in All You Need is Love.

Is that it, or are there others? Extra points for Beatles songs that reference non-Beatles songs, and vice-versa--the latter especially if they're by ex-Beatles, perhaps most famously Lennon's How Do You Sleep?