The Burlington Magazine (Vol. 165, no. 1443) has published an article on a third self-portrait by Gillis van Tilborgh, written by Leen Kelchtermans and Katharina van Cauteren.
The article currently is available online for a limited time: https://www.burlington.org.uk/archive/article/a-third-self-portrait-by-gillis-van-tilborgh?utm_source=HNA&utm_medium=General&utm_campaign=June+23+issue+promo