Fix broken links in english documentation

docs-en/calculators/hyd_en_charge/lechapt-calmon.md

@@ -2,7 +2,7 @@
 
 Loss of charge in a circular pipe: Lechapt and Calmon abacus
 
-Lechapt and Calmon formula is based on adjustements of [Cyril Frank Colebrook](http://fr.wikipedia.org/wiki/Cyril_Frank_Colebrook) formula:
+Lechapt and Calmon formula is based on adjustements of [Cyril Frank Colebrook formula](https://en.wikipedia.org/wiki/Darcy_friction_factor_formulae#Colebrook%E2%80%93White_equation):
 
 $$J=L.Q^M.D^{-N}$$
 

docs-en/calculators/structures/liste.md

@@ -16,5 +16,5 @@
 | [Submerged orifice](./orifice_noye.md) | 0.7 | Parallel Structures, Cross walls, Downwall |
 | [Free orifice](./orifice_denoye.md) | 0.7 | Parallel Structures |
 | [Villemonte 1947](./villemonte_1947.md) | 0.4 | Parallel Structures, Cross walls, Downwall |
-| [Regulated notch (Villemonte 1957)](../pab/pab.md#la-cloison-aval) | 0.4 | Downwall |
-| [Regulated submerged slot (Larinier 1992)](../pab/pab.md#la-cloison-aval) | 0.75 | Downwall |
\ No newline at end of file
+| [Regulated notch (Villemonte 1957)](../pab/pab.md#the-downstream-partition) | 0.4 | Downwall |
+| [Regulated submerged slot (Larinier 1992)](../pab/pab.md#the-downstream-partition) | 0.75 | Downwall |
\ No newline at end of file