<bdi><a href="https://www.wikidata.org/wiki/Q18516740" class="extiw" title="d:Q18516740">Monogrammist BOS with the knife</a>
</bdi>
Max J. Friedländer (1969) <i>Early Netherlandisch Painting. Volume V. Geertgen tot Sint Jans and Jerome Bosch</i>, Leyden: A.W. Slijthof, Brussels: La Connaissance, plate 134B.