diff --git a/docs/en/calculators/pam/macrorugo_theorie.md b/docs/en/calculators/pam/macrorugo_theorie.md
index 0af3abecdb25360e3f0443d4f95c5820ab42a00b..63f13edd83d6e227ad4597000f06e1091a112888 100644
--- a/docs/en/calculators/pam/macrorugo_theorie.md
+++ b/docs/en/calculators/pam/macrorugo_theorie.md
@@ -136,14 +136,12 @@ For the cylindrical form of the blocks, \(\sigma\) is equal to \(\pi / 4\) and f
 
 ### Ratio between the average speed downstream of a block and the maximum speed *r*
 
-Cassan et al. (2014) [^2], Table 2 gives experimental measurements of this ratio for cylindrical blocks (\(r=1.2\)), rounded faces (\(r=1.2)\) and flat faces (\(r=1.5\)).
+The value of this ratio is (\(r=1.1\)) for cylindrical blocks (Tran et al. 2016 [^3]), and (\(r=1.5\)) for flat-faced blocks (Cassan et al. (2014)[^2], Table 2).
 
 The formula used in Cassiopeia allows to take into account shapes of intermediate blocks between circular and square shapes from the values of \(C_{d0} = 1.1\) for cylindrical blocks and \(C_{d0} = 2.6\) for blocks with flat faces:
 
 $$ r = (C_{d0} *0.4 + 1.121) / 1.5 $$
 
-We now have \(r = 1.1\) for circular blocks and \(r = 1.35\) for flat-faced blocks.
-
 ### Froude *F*
 
 $$F = \frac{V_g}{\sqrt{gh}}$$
diff --git a/docs/fr/calculators/pam/macrorugo_theorie.md b/docs/fr/calculators/pam/macrorugo_theorie.md
index a2a99f4aa095f5cc40be36587161f94f2765710e..454b68578f0e8936deecbc6dc53fffd5030fbde3 100644
--- a/docs/fr/calculators/pam/macrorugo_theorie.md
+++ b/docs/fr/calculators/pam/macrorugo_theorie.md
@@ -133,7 +133,7 @@ On a donc \(\sigma = \pi / 4\) pour un bloc circulaire et \(\sigma = 1\) pour un
 
 ### Ratio entre la vitesse moyenne à l'aval d'un block et la vitesse maximale *r*
 
-Cassan et al. (2014)[^2], Table 2 donne des mesures expérimentales de ce ratio pour les blocs cylindriques (\(r=1.2\)), aux faces arrondies (\(r=1.2)\) et aux faces planes (\(r=1.5\)).
+La valeur de ce ratio est de (\(r=1.1\)) pour les blocs cylindriques (Tran et al. 2016 [^3]), et (\(r=1.5\)) pour les blocs à faces planes (Cassan et al. (2014)[^2], Table 2).
 
 La formule utilisée dans Cassiopée permet une prise en compte de formes de plots intermédiaires entre les formes circulaire et carré à partir des valeurs de \(C_{d0} = 1.1\) pour les blocs cylindriques et \(C_{d0} = 2.6\) pour les blocs à faces planes :
 
@@ -223,6 +223,10 @@ $$C_f = \frac{2}{(5.1 \mathrm{log} (h/k_s)+6)^2}$$
 - \(z_0\) : rugosité hydraulique (m)
 - \(\tilde{z}\) : position verticale adimensionnelle \(\tilde{z} = z / k\)
 
-[^1]: Cassan L, Laurens P. 2016. Design of emergent and submerged rock-ramp fish passes. Knowl. Manag. Aquat. Ecosyst., 417, 45
+[^1]: Cassan L, Laurens P. 2016. Design of emergent and submerged rock-ramp fish passes. Knowl. Manag. Aquat. Ecosyst., 417, 45. https://doi.org/10.1051/kmae/2016032
 
 [^2]: Cassan, L., Tien, T.D., Courret, D., Laurens, P., Dartus, D., 2014. Hydraulic Resistance of Emergent Macroroughness at Large Froude Numbers: Design of Nature-Like Fishpasses. Journal of Hydraulic Engineering 140, 04014043. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000910
+
+[^3]: Tran, T.D., Chorda, J., Laurens, P., Cassan, L., 2016. Modelling nature-like fishway flow around unsubmerged obstacles using a 2D shallow water model. Environmental Fluid Mechanics 16, 413–428. https://doi.org/10.1007/s10652-015-9430-3
+
+