| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Communications and Power in Medieval Europe: The Carolingian and Ottonian Centuries v. 1 | 978-1-85285-013-5 (1-85285-013-2) | 1994 |
| Communications and Power in Medieval Europe: The Gregorian Revolution and Beyond v. 2 | 978-1-85285-113-2 (1-85285-113-9) | 1994 |
| Medieval Germany and its Neighbours, 900-1250 | 978-0-907628-08-8 (0-907628-08-7) | 1982 |
K L · Karl J Leyser · Karl Lieser · Karl Locher · Karl Luggauer · KAROLE LAUZIER · Károly Lázár