diff --git a/R/rderekovecs-package.R b/R/rderekovecs-package.R
new file mode 100644
index 0000000..213d96f
--- /dev/null
+++ b/R/rderekovecs-package.R
@@ -0,0 +1,15 @@
+#' @keywords internal
+"_PACKAGE"
+
+## usethis namespace: start
+#' @importFrom utils citation
+
+.onAttach<-function(libname, pkgname){
+  requireNamespace("utils")
+  cit<-citation(pkgname)
+  txt<-paste(c(format(cit,"citation")),collapse="\n\n")
+  packageStartupMessage(txt)
+}
+
+## usethis namespace: end
+NULL