Interview with Chris Claremont at ComixMix News "No, it's the Marvel Universe, there's no real change to it, other than the fact that in a very practical sense that the subsequent sixteen, seventeen years of material following my departure doesn't exist."
comics.org
Layton, Bob (w), Guice, Jackson (p), Rubinstein, Joe (i), Scotese, Petra (col), Rosen, Joe (let), Harras, Bob (ed). "Bless the Beasts and Children"X-Factor, no. 2 (March 1986). Marvel Comics. Retrieved on 2021-07-24.
Claremont, Chris (w), Adams, Art (p), Green, Dan, Bob Wiacek, Al Milgrom, Art Thibert, Steve Mancuse (i), Vancata, Brad (col), Orzechowski, Tom (let), Harras, Bob (ed). "Days of Future Present (Part 4): You Must Remember This"Uncanny X-Men, vol. 1, no. Annual 14 (1990). Marvel Comics.
