Kikuchi, S.  (2014).  From Eckhart to Ruusbroec. A Critical Inheritance of Mystical Themes in the Fourteenth Century. Mediaevalia Lovaniensia. Series 1. Studia (Vol. 44, p. 312). Leuven: Leuven University Press.

Kikuchi, S.  (2012).  Ruusbroec's Concept of gemeen (Common) Reconsidered. Ons Geestelijk Erf, 83(2), 97-121.