diff --git a/README.md b/README.md
index f6fb802..6408f9b 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 # An R package for the simulation of leaf optical properties based on their biochemical and biophysical properties using the PROSPECT leaf model. 
 
-[![licence](https://img.shields.io/badge/Licence-GPL--3-blue.svg)](https://www.r-project.org/Licenses/GPL-3)
+[![licence](https://img.shields.io/badge/Licence-MIT-blue.svg)](https://www.r-project.org/Licenses/MIT)
 [![Build Status](https://gitlab.com/jbferet/prospect/badges/master/pipeline.svg)](https://gitlab.com/jbferet/prospect/pipelines/latest)
 
 # 1 Install
diff --git a/paper/paper.md b/paper/paper.md
index 358ad29..7b41f67 100644
--- a/paper/paper.md
+++ b/paper/paper.md
@@ -72,7 +72,10 @@ It also provides links to distribution corresponding to the coupling of PROSPECT
 with vegetation models such as COSINE dedicated to close-range imaging 
 spectroscopy [@jay_physically-based_2016] and PROSAIL for canopy reflectance modeling 
 [verhoef_coupled_2007, @verhoef_unified_2007, @jacquemoud_prospect+_2009]. 
-Note that PROSPECT is also available in packages written in [python](https://github.com/jgomezdans/prosail), 
+A version of this R package `prospect` coupled with the SAIL canopy model 
+is available in the R package [`prosail`](https://jbferet.gitlab.io/prosail/index.html). 
+Note that PROSPECT and PROSAIL are also available in packages written in 
+[python](https://github.com/earth-chris/xleaf), 
 [Julia](https://github.com/RemoteSensingTools/CanopyOptics.jl) and [R](https://github.com/ashiklom/rrtm).
 
 PROSPECT versions 4 and 5 developed by [@feret2008] are deprecated. 
@@ -84,7 +87,6 @@ This includes parameterizable inversion routines, to ease physical model inversi
 for beginners, and to help advanced users in designing and testing their own 
 inversion strategy. 
 
-
 # Overview
 
 ## PROSPECT simulation in forward mode
@@ -302,7 +304,8 @@ constituent content either from directional-hemispherical reflectance and
 transmittance, or from reflectance or transmittance only. 
 `prospect` provides latest advances in terms of model version and inversion 
 procedures to the leaf spectroscopy community. 
-`prospect` is coupled with the canopy model SAIL through the R package [`prosail`](https://jbferet.gitlab.io/prosail/index.html).
+`prospect` is coupled with the canopy model SAIL through the R package 
+[`prosail`](https://jbferet.gitlab.io/prosail/index.html).
 `prosail` is dedicated to applications focusing on Earth observation imagery analysis 
 and allows simulation of canopy reflectance for multispectral and hyperspectral sensors.
 Hybrid inversions based on physical modeling and machine learning are also implemented 
diff --git a/vignettes/prospect.Rmd b/vignettes/prospect.Rmd
index 8bc29ba..35e8b84 100644
--- a/vignettes/prospect.Rmd
+++ b/vignettes/prospect.Rmd
@@ -104,9 +104,29 @@ See the following pages of the tutorial for an illustration of how to use `prosp
 
 # `prospect`: Miscellaneous
 
-The package currently only includes a version of the model covering teh domain from 400 nm to 2500 nm. However, several valuable alternative versions exist, but are not available in the current version of the package:
+## Fluorescence & extended infrared domain
+
+The package currently only includes a version of the model covering the domain from 400 nm to 2500 nm. However, several valuable alternative versions exist, but are not available in the current version of the package:
 
 - [PROSPECT-VISIR](https://www.sciencedirect.com/science/article/abs/pii/S0034425710002841?via%3Dihub), modeling directional–hemispherical reflectance and transmittance of fresh and dry leaves from 0.4 μm to 5.7 μm.
 - [FLUSPECT](https://www.sciencedirect.com/science/article/abs/pii/S0034425718301573?via%3Dihub), radiative transfer model for leaf chlorophyll fluorescence.
 
 These models may be added in a future version of the package.
+
+## Alternative distributions and coupling with SAIL
+
+__We strongly recommend using version D or PRO instead of versions 4 and 5__. 
+
+A version of the R package `prospect` coupled with the __SAIL canopy model__ 
+is available in the R package [`prosail`](https://jbferet.gitlab.io/prosail/index.html). 
+
+Alternative implementations of PROSPECT and PROSAIL can be found in various languages. 
+A non-exhaustive list of distributions of these models is available at 
+[this webpage](http://teledetection.ipgp.jussieu.fr/prosail/). 
+It includes Matlab, Fortran and R implementations of versions 4, 5, D and PRO 
+of PROSPECT. 
+
+Note that additional versions of PROSPECT and PROSAIL model are also available 
+in packages written in [python](https://github.com/earth-chris/xleaf), 
+[Julia](https://github.com/RemoteSensingTools/CanopyOptics.jl) and 
+[R](https://github.com/ashiklom/rrtm).