| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| On Yawning, or, The Hidden Sexuality of the Human Yawn | 978-9O-73838-22-2 (9O-73838-22-3) | 2005 |
W.S. · Walter Santagata · Walter Santucci · Walter Schmidkunz · Walter Schmiedgen · Walter Schmitz · Wiltrud Schnütgen