From d71e9bb1730e9f84afed16388e6fa33878286949 Mon Sep 17 00:00:00 2001
From: Gard Spreemann <gspr@nonempty.org>
Date: Mon, 13 Dec 2021 15:10:29 +0100
Subject: Add more references to upstream metadata

---
 debian/upstream/metadata | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/debian/upstream/metadata b/debian/upstream/metadata
index 2aba292..0ae2516 100644
--- a/debian/upstream/metadata
+++ b/debian/upstream/metadata
@@ -6,3 +6,19 @@ Reference:
   Volume: 16
   Number: 5
   Pages: 1190-1208
+Reference:
+  Title: "L-BFGS-B: Algorithm 778: L-BFGS-B, FORTRAN routines for large scale bound constrained optimization"
+  Author: C. Zhu, R. H. Byrd and J. Nocedal
+  Journal: ACM Transactions on Mathematical Software
+  Year: 1997
+  Volume: 23
+  Number: 4
+  Pages: 550-560
+Reference:
+  Title: "Remark on Algorithm 778: L-BFGS-B, FORTRAN routines for large scale bound constrained optimization"
+  Author: J.L. Morales and J. Nocedal
+  Journal: ACM Transactions on Mathematical Software
+  Year: 2011
+  Volume: 38
+  Number: 1
+  Pages: 1-4
-- 
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