Updates biblio: c7ca988 Adds @ribeiro2019

diff --git a/biblio b/biblio
index 43f7794389555e0e1914393268ca9383e15d1f85..c7ca988d62b941a074e7d2e7baaf9126d429a018 160000 (submodule)
--- a/biblio
+++ b/biblio
@@ -1 +1 @@
-Subproject commit 43f7794389555e0e1914393268ca9383e15d1f85
+Subproject commit c7ca988d62b941a074e7d2e7baaf9126d429a018