diff --git a/CITATION.cff b/CITATION.cff
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--- /dev/null
+++ b/CITATION.cff
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+cff-version: 0.4.0
+message: "If you use this software, please cite the following scientific paper."
+authors:
+- family-names: "de Winter"
+  given-names: "Niels Jonathan"  
+  orcid: "https://orcid.org/0000-0002-1453-5407"
+title: "ShellChron"
+version: 0.4.0
+date-released: 2021-09-02
+url: "https://github.com/nielsjdewinter/ShellChron"
+preferred-citation:
+  type: article
+  authors:
+  - family-names: "de Winter"
+    given-names: "Niels Jonathan"  
+    orcid: "https://orcid.org/0000-0002-1453-5407"
+  journal: "Geoscientific Model Development"
+  month: 6
+  title: "ShellChron 0.4.0: A new tool for constructing chronologies in accretionary carbonate archives from stable oxygen isotope profiles"
+  volume: 16
+  year: 2022
diff --git a/LICENSE b/LICENSE
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+++ b/LICENSE
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+MIT License
+
+Copyright (c) 2022 Niels J. de Winter
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.