diff --git a/R/ci.R b/R/ci.R
index b9dd987..1d54977 100644
--- a/R/ci.R
+++ b/R/ci.R
@@ -2,8 +2,12 @@
 #' Add confidence interval and relative frequency variables
 #'
 #' Using \code{\link{prop.test}}, \code{ci} adds three columns to a data frame:
-#' 1. relative frequency (\code{f}) 2. lower bound of a confidence interval
-#' (\code{ci.low}) 3. upper bound of a confidence interval
+#' 1. relative frequency (\code{f})
+#' 2. lower bound of a confidence interval (\code{ci.low})
+#' 3. upper bound of a confidence interval
+#'
+#' @seealso
+#' \code{ci} is alread included in \code{\link{frequencyQuery}}
 #'
 #' @param df table with columns for absolute and total frequencies.
 #' @param x  column with the observed absolute frequency.
@@ -13,6 +17,7 @@
 #'
 #' @export
 #' @importFrom stats prop.test
+#' @importFrom tibble remove_rownames
 #' @examples
 #' library(ggplot2)
 #' kco <- new("KorAPConnection", verbose=TRUE)