diff --git a/CITATION.cff b/CITATION.cff
deleted file mode 100644
index 9ff7e71..0000000
--- a/CITATION.cff
+++ /dev/null
@@ -1,39 +0,0 @@
-cff-version: 1.2.0
-message: "If you use this software, please cite it as below."
-authors:
-- family-names: "Müller"
-  given-names: "Konstantin"
-  orcid: "https://orcid.org/0000-0001-6540-3124"
-- family-names: "Schwalb-Willmann"
-  given-names: "Jakob"
-  orcid: "https://orcid.org/0000-0003-2665-1509"
-- family-names: "Wegmann"
-  given-names: "Martin"
-  orcid: "https://orcid.org/0000-0003-0335-9601"
-- family-names: "Leutner"
-  given-names: "Benjamin"
-  orcid: "https://orcid.org/0000-0002-6893-2002"
-title: "RStoolbox: An R package for Remote Sensing Data Analysis"
-version: 1.0.1
-doi: 10.1111/2041-210X.14451
-url: "https://github.com/bleutner/RStoolbox"
-year: 2024
-preferred-citation:
-  type: article
-  authors:
-  - family-names: "Müller"
-    given-names: "Konstantin"
-    orcid: "https://orcid.org/0000-0001-6540-3124"
-  - family-names: "Schwalb-Willmann"
-    given-names: "Jakob"
-    orcid: "https://orcid.org/0000-0003-2665-1509"
-  - family-names: "Wegmann"
-    given-names: "Martin"
-    orcid: "https://orcid.org/0000-0003-0335-9601"
-  - family-names: "Leutner"
-    given-names: "Benjamin"
-    orcid: "https://orcid.org/0000-0002-6893-2002"
-  doi: "10.1111/2041-210X.14451"
-  journal: "Methods in Ecology and Evolution"
-  title: "RStoolbox: An R package for Remote Sensing Data Analysis"
-  year: 2024
\ No newline at end of file
diff --git a/NEWS.md b/NEWS.md
index 60d7a5a..7ac737a 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -20,11 +20,11 @@ Minor changes before major release
 # RStoolbox 0.4.0
 Rewrite of `RStoolbox`, migration from `raster` to `terra` and `sp` to `sf`
 
-# New:
+## New:
 * RStoolbox moved on from the outdated `sp` and `raster` packages to `sf` and `terra` to ensure long term support of the tools.
 * Thrown out unnecessary libraries
 
-# Fixes:
+## Fixes:
 * `rasterPCA()`: Fixed a bug that caused the method and its unit tests to fail on Linux due to a corrupted covariance matrix calculated previously with `terra::layerCor()`
 * `superClass()` unable to predict when there is NA in raster data (closes #102, reported by @bappa10085)
 
diff --git a/inst/CITATION b/inst/CITATION
index 8a7fe34..1315c23 100644
--- a/inst/CITATION
+++ b/inst/CITATION
@@ -1,3 +1,5 @@
+citHeader("Please cite RStoolbox, e.g. when you use it in projects or publications:")
+
 bibentry(
   bibtype  = "Article",
   title    = "RStoolbox: An R package for Remote Sensing Data Analysis",
diff --git a/man/spectralIndices.Rd b/man/spectralIndices.Rd
index 80501ed..d73551d 100755
--- a/man/spectralIndices.Rd
+++ b/man/spectralIndices.Rd
@@ -129,7 +129,7 @@ plot(SI)
 # Get all indices
 idxdb <- getOption("RStoolbox.idxdb")
 
-# Cutomize the RStoolbox index-database and overwrite the option
+# Customize the RStoolbox index-database and overwrite the option
 cdb <- c(idxdb, CUSTOM = list( list(c("Mueller2024", "Super custom index"),
         function(blue, red) {blue + red})))
 rsOpts(idxdb = cdb)