diff --git a/pages/Sigman___Dos marchando juntos.md b/pages/Sigman___Dos marchando juntos.md
index c58626a..9588f9a 100644
--- a/pages/Sigman___Dos marchando juntos.md	
+++ b/pages/Sigman___Dos marchando juntos.md	
@@ -75,5 +75,7 @@
 		  logseq.order-list-type:: number
 		- Piff, P. K., Wiwad, D., Robinson, A. R., Aknin, L. B., Mercier, B., & Shariff, A. (2020). *Shifting attributions for poverty motivates opposition to inequality and enhances egalitarianism*. Nature Human Behaviour, 4(5), 496-505.
 		  logseq.order-list-type:: number
--
+		- Frith, C., & Frith, U. (2005). *Theory of mind*. Current biology, 15(17), R644-R645.
+		  logseq.order-list-type:: number
+		- logseq.order-list-type:: number
 -
\ No newline at end of file