Memoirs of the American Mathematical Society, ISSN 0065-9266 ; Volume 79, Number 402
Print version: Walther, Hans-Otto. Hyberbolic periodic solutions, heteroclinic connections, and transversal homoclinic points in autonomous differential delay equations. Providence, Rhode Island : American Mathematical Society, c1989 iv, 104 pages Memoirs of the American Mathematical Society ; Volume 79, Number 402. ISBN 9780821824672
"May 1989, Volume 79, Number 402 (second of 4 numbers)."