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-rw-r--r--biblio/citation-style-language/citeproc-node-group.lua6
1 files changed, 6 insertions, 0 deletions
diff --git a/biblio/citation-style-language/citeproc-node-group.lua b/biblio/citation-style-language/citeproc-node-group.lua
index 3148e96148..51969212ba 100644
--- a/biblio/citation-style-language/citeproc-node-group.lua
+++ b/biblio/citation-style-language/citeproc-node-group.lua
@@ -1,3 +1,9 @@
+--
+-- Copyright (c) 2021-2022 Zeping Lee
+-- Released under the MIT license.
+-- Repository: https://github.com/zepinglee/citeproc-lua
+--
+
local group = {}
local element = require("citeproc-element")