diff --git a/R/make.R b/R/make.R
index da02d794e9..858714cb0c 100644
--- a/R/make.R
+++ b/R/make.R
@@ -1747,7 +1747,7 @@ graph_from_lcf <- lcf_vector_impl
 #' @references V. Havel,
 #' Poznámka o existenci konečných grafů (A remark on the existence of finite graphs),
 #' Časopis pro pěstování matematiky 80, 477-480 (1955).
-#' <https://eudml.org/doc/19050>
+#' https://eudml.org/doc/19050
 #'
 #' S. L. Hakimi,
 #' On Realizability of a Set of Integers as Degrees of the Vertices of a Linear Graph,
diff --git a/man/realize_degseq.Rd b/man/realize_degseq.Rd
index c1d2f384cf..270725473a 100644
--- a/man/realize_degseq.Rd
+++ b/man/realize_degseq.Rd
@@ -90,7 +90,7 @@ all(degree(g5) == degs)
 V. Havel,
 Poznámka o existenci konečných grafů (A remark on the existence of finite graphs),
 Časopis pro pěstování matematiky 80, 477-480 (1955).
-\url{https://eudml.org/doc/19050}
+https://eudml.org/doc/19050
 
 S. L. Hakimi,
 On Realizability of a Set of Integers as Degrees of the Vertices of a Linear Graph,