Imaizumi, Tsuda, Imai et al.: "Molecular cloning of a novel polypeptide, DP5, induced during programmed neuronal death." in: The Journal of biological chemistry, Vol. 272, Issue 30, pp. 18842-8, 1997 (PubMed).
Inohara, Ding, Chen et al.: "harakiri, a novel regulator of cell death, encodes a protein that activates apoptosis and interacts selectively with survival-promoting proteins Bcl-2 and Bcl-X(L)." in: The EMBO journal, Vol. 16, Issue 7, pp. 1686-94, 1997 (PubMed).