diff --git a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md
index 0abbb20b3..8e0fabe7f 100644
--- a/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/04.reference-frames-coordinate-systems/textbook.fr.md
@@ -54,6 +54,16 @@ true north; $`l=-\,90° \leftrightarrow`$ geographic south pole. <br>
 \- Longitude $`L`$: $`L = 0°\,0'\,0'' \leftrightarrow`$ Grennwich (city, UK);
 \- Links with measurement of angles in degrees with a protractor. <br>
 \- $`1° = 60'`$ (minute of arc); $`1'= 60''`$ (arc second). <br>
+<br>
+<br>Ejemplos / Exemples / Examples :<br>
+[ES] [EN]<br>
+\- UNAL-Manizales : $5°03'22.08N'' \quad 75°29'28.37''O \quad 2132m`$<br>
+\- Univ de Guadalajara : $20°40'25.76N'' \quad 103°21'30.62''O \quad 1557m`$<br>
+\- INSA-Toulouse : $43°34'11.67N'' \quad 1°28'03.85''E \quad 2132m`$<br>
+[FR]<br>
+\- UNAL-Manizales : $5°03'22.08N'' \quad 75°29'28,37''O \quad 2132m`$<br>
+\- Univ de Guadalajara : $20°40'25.76N'' \quad 103°21'30,62''O \quad 1557m`$<br>
+\- INSA-Toulouse : $43°34'11.67N'' \quad 1°28'03,85''E \quad 2132m`$<br>
 
 
 # En mecánica clásica / En mécanique classique / In classical mechanics