diff --git a/R/macaque.R b/R/macaque.R
index ff608a6..c56b1e7 100644
--- a/R/macaque.R
+++ b/R/macaque.R
@@ -24,6 +24,7 @@
 #'   the main cortical areas and connections involved in the tactile
 #'   function of the visual cortex by network analysis. *European
 #'     Journal of Neuroscience*, 23(7): 1919-1930, 2006.
+#' \doi{10.1111/j.1460-9568.2006.04678.x}
 #' @source See reference below.
 #' @keywords datasets
 NULL
diff --git a/man/macaque.Rd b/man/macaque.Rd
index 85fdee5..272e270 100644
--- a/man/macaque.Rd
+++ b/man/macaque.Rd
@@ -29,5 +29,6 @@ Negyessy L., Nepusz T., Kocsis L., Bazso F.: Prediction of
 the main cortical areas and connections involved in the tactile
 function of the visual cortex by network analysis. \emph{European
 Journal of Neuroscience}, 23(7): 1919-1930, 2006.
+\doi{10.1111/j.1460-9568.2006.04678.x}
 }
 \keyword{datasets}