diff --git a/src/permacomputing.gmo b/src/permacomputing.gmo
index caf7409..129ba28 100644
--- a/src/permacomputing.gmo
+++ b/src/permacomputing.gmo
@@ -86,4 +86,8 @@ salvage computing refers to utilizing only already available computational resou
 
 => https://wimvanderbauwhede.github.io/articles/frugal-computing/ frugal computing - Wim Vanderbauwhede
 
+## and more
+
+=> https://computingwithinlimits.org/2021/papers/limits21-devalk.pdf Marloes de Valk: A pluriverse of local worlds: a review of Computing within Limits related terminology and practices
+
 see also {references}