diff --git a/base/src/test/test_cell_info_n_sheets b/base/src/test/test_cell_info_n_sheets
new file mode 100644
index 00000000..ff2d950e
--- /dev/null
+++ b/base/src/test/test_cell_info_n_sheets
@@ -0,0 +1,35 @@
+#![allow(clippy::unwrap_used)]
+
+use crate::test::util::new_empty_model;
+
+#[test]
+fn arguments() {
+ let mut model = new_empty_model();
+ model._set("A1", "=CELL("address",A1)");
+ model._set("A2", "=CELL()");
+
+ model._set("A3", "=INFO("system")");
+ model._set("A4", "=INFO()");
+
+ model._set("A5", "=N(TRUE)");
+ model._set("A6", "=N()");
+ model._set("A7", "=N(1, 2)");
+
+ model._set("A8", "=SHEETS()");
+ model._set("A9", "=SHEETS(1)");
+
+ model.evaluate();
+
+ assert_eq!(model._get_text("A1"), *"$A$1");
+ assert_eq!(model._get_text("A2"), *"#ERROR!");
+
+ assert_eq!(model._get_text("A3"), *"#N/IMPL!");
+ assert_eq!(model._get_text("A4"), *"#ERROR!");
+
+ assert_eq!(model._get_text("A5"), *"1");
+ assert_eq!(model._get_text("A6"), *"#ERROR!");
+ assert_eq!(model._get_text("A7"), *"#ERROR!");
+
+ assert_eq!(model._get_text("A8"), *"1");
+ assert_eq!(model._get_text("A9"), *"#N/IMPL!");
+}
diff --git a/docs/src/functions/information.md b/docs/src/functions/information.md
index cb649fd3..fc5b6bd5 100644
--- a/docs/src/functions/information.md
+++ b/docs/src/functions/information.md
@@ -11,7 +11,7 @@ You can track the progress in this [GitHub issue](https://github.com/ironcalc/Ir
| Function | Status | Documentation |
| ---------- | ---------------------------------------------- | ------------- |
-| CELL | | – |
+| CELL | | – |
| ERROR.TYPE | | – |
| INFO | | – |
| ISBLANK | | – |
@@ -20,7 +20,7 @@ You can track the progress in this [GitHub issue](https://github.com/ironcalc/Ir
| ISEVEN | | – |
| ISFORMULA | | – |
| ISLOGICAL | | – |
-| ISNA | | – |
+| ISNA | | – |
| ISNONTEXT | | – |
| ISNUMBER | | – |
| ISODD | | – |
@@ -30,5 +30,5 @@ You can track the progress in this [GitHub issue](https://github.com/ironcalc/Ir
| N | | – |
| NA | | – |
| SHEET | | – |
-| SHEETS | | – |
+| SHEETS | | – |
| TYPE | | – |
diff --git a/docs/src/functions/information/cell.md b/docs/src/functions/information/cell.md
index 68bfb5e3..120d1740 100644
--- a/docs/src/functions/information/cell.md
+++ b/docs/src/functions/information/cell.md
@@ -7,6 +7,5 @@ lang: en-US
# CELL
::: warning
-🚧 This function is not yet available in IronCalc.
-[Follow development here](https://github.com/ironcalc/IronCalc/labels/Functions)
+🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
:::
\ No newline at end of file
diff --git a/docs/src/functions/information/n.md b/docs/src/functions/information/n.md
index 1a46320b..87b4a501 100644
--- a/docs/src/functions/information/n.md
+++ b/docs/src/functions/information/n.md
@@ -7,6 +7,5 @@ lang: en-US
# N
::: warning
-🚧 This function is not yet available in IronCalc.
-[Follow development here](https://github.com/ironcalc/IronCalc/labels/Functions)
+🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
:::
\ No newline at end of file
diff --git a/docs/src/functions/information/sheets.md b/docs/src/functions/information/sheets.md
index e230a8f0..9c480328 100644
--- a/docs/src/functions/information/sheets.md
+++ b/docs/src/functions/information/sheets.md
@@ -7,6 +7,5 @@ lang: en-US
# SHEETS
::: warning
-🚧 This function is not yet available in IronCalc.
-[Follow development here](https://github.com/ironcalc/IronCalc/labels/Functions)
+🚧 This function is implemented but currently lacks detailed documentation. For guidance, you may refer to the equivalent functionality in [Microsoft Excel documentation](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb).
:::
\ No newline at end of file
diff --git a/xlsx/tests/calc_tests/CELL.xlsx b/xlsx/tests/calc_tests/CELL.xlsx
new file mode 100644
index 00000000..c7aa5159
Binary files /dev/null and b/xlsx/tests/calc_tests/CELL.xlsx differ
diff --git a/xlsx/tests/calc_tests/N.xlsx b/xlsx/tests/calc_tests/N.xlsx
new file mode 100644
index 00000000..7471192f
Binary files /dev/null and b/xlsx/tests/calc_tests/N.xlsx differ
diff --git a/xlsx/tests/calc_tests/N_CELL_INFO_SHEETS.xlsx b/xlsx/tests/calc_tests/N_CELL_INFO_SHEETS.xlsx
deleted file mode 100644
index f9d93005..00000000
Binary files a/xlsx/tests/calc_tests/N_CELL_INFO_SHEETS.xlsx and /dev/null differ
diff --git a/xlsx/tests/calc_tests/SHEET_SHEETS.xlsx b/xlsx/tests/calc_tests/SHEET_SHEETS.xlsx
new file mode 100644
index 00000000..e7efdf35
Binary files /dev/null and b/xlsx/tests/calc_tests/SHEET_SHEETS.xlsx differ