Index: landscape/solvers.txt
===================================================================
--- landscape/solvers.txt	(revision 37411)
+++ landscape/solvers.txt	(revision 37412)
@@ -1,5 +1,9 @@
 New research, 2023-05
 ~~~~~~~~~~~~~~~~~~~~~
+
+Comparison: https://www.matecdev.com/posts/differences-fdtd-fem-mom.html
+
+
 OpenEMS:
 	vitality: maintained, slowly; unreliable hosting, in transition to github
 	viability: broken build system; cleanup project on repo.hu: tinyopenems
@@ -32,3 +36,6 @@
 
 freefem:
 	TODO
+
+elmer:
+	TODO