diff --git a/pages/Sigman___Dos marchando juntos.md b/pages/Sigman___Dos marchando juntos.md
index e600c8a..4f49ff7 100644
--- a/pages/Sigman___Dos marchando juntos.md	
+++ b/pages/Sigman___Dos marchando juntos.md	
@@ -47,5 +47,7 @@
 		  logseq.order-list-type:: number
 		- Genet, J. (1983). *Diario del ladrón*. España: Seix Barral.
 		  logseq.order-list-type:: number
+		- Yamazaki, K., Beauchamp, G. K., Imai, Y., Bard, J., Phelan, S. P., Thomas, L., & Boyse, E. A. (1990). *Odor types determined by the major histocompatibility complex in germfree mice*. Proceedings of the National Academy of Sciences, 87(21), 8413-8416.
+		  logseq.order-list-type:: number
 -
 -
\ No newline at end of file