General note: References to Christopher Tolkien occur frequently in the editorial comments in Parma Eldalamberon and Vinyar Tengwar, mostly as editor of his father's works. However, these references (similarly to references to J.R.R. Tolkien himself) are not indexed.
J.R.R. Tolkien, "Early Qenya and The Valmaric Script", in Parma Eldalamberon XIV (edited by Carl F. Hostetter, Christopher Gilson, Arden R. Smith, Patrick H. Wynne, and Bill Welden)
- their third son, Christopher, was born. 
J.R.R. Tolkien, "The Qenya Alphabet", in Parma Eldalamberon XX (edited by Arden R. Smith)
- [Comment from personal communication] ; Christopher [...] private alphabet 52; Christoper Reuel 78
J.R.R. Tolkien, "The 'Túrin Wrapper'" (edited by Carl F. Hostetter), in Vinyar Tengwar, Number 50, March 2013
- [Manuscript description from personal communication] , 
J.R.R. Tolkien, "Fragments on Elvish Reincarnation" (edited by Michaël Devaux with the assistance of Christopher Tolkien and Carl F. Hostetter), in J.R.R. Tolkien, l'effigie des Elfes, La Feuille de la Compagnie, Nr. 3 - This publication is currently being indexed — page references might be missing!