Under the Copyright Act, 1957, where names of all authors are pseudonyms and identity of one of them is…

Section 23(3)(c) provides that, where all the authors use pseudonyms and the identity of one is disclosed, references are to "the author whose identity is disclosed", and if two or more are disclosed, to the one among them who dies last. Undisclosed authors are left out of the count, and neither the publisher nor the order of names matters.