diff --git a/src/ifcopenshell-python/docs/ifcopenshell-python/selector_syntax.rst b/src/ifcopenshell-python/docs/ifcopenshell-python/selector_syntax.rst
index e322ac675c..cdc89f5af7 100644
--- a/src/ifcopenshell-python/docs/ifcopenshell-python/selector_syntax.rst
+++ b/src/ifcopenshell-python/docs/ifcopenshell-python/selector_syntax.rst
@@ -127,7 +127,7 @@ three ways you can do so:
 
     "Quoted string", "``""foo \""bar\"" baz""``", "The value must be in double quotes. The value may contain spaces, symbols, and other characters. If you need to use a double quote, you can escape it with a backslash. This is the safest, most general way to specify a value."
     "Unquoted string", "``foobarbaz``", "For convenience, if you have a simple value which contains no spaces or special characters, you are free to specify it as an unquoted string."
-    "Regex string", "``/foo.*baz/``", "You may specify a Python-compatible regex pattern delimited by forward slashes."
+    "Regex string", "``/foo.*baz/``", "You may specify a Python-compatible regex pattern delimited by forward slashes. You can learn more about regular expressions from `Beginners Regex tutorial <https://regexone.com/>`_ and `Online Regex testing website <https://regex101.com/>`_."
 
 Getting element values
 ----------------------
@@ -204,7 +204,7 @@ do so:
 
     "Quoted string", "``""foo \""bar\"" baz""``", "The value must be in double quotes. The value may contain spaces, symbols, and other characters. If you need to use a double quote, you can escape it with a backslash. This is the safest, most general way to specify a value."
     "Unquoted string", "``foobarbaz``", "For convenience, if you have a simple value which contains no spaces or special characters, you are free to specify it as an unquoted string."
-    "Regex string", "``/foo.*baz/``", "You may specify a Python-compatible regex pattern delimited by forward slashes."
+    "Regex string", "``/foo.*baz/``", "You may specify a Python-compatible regex pattern delimited by forward slashes. You can learn more about regular expressions from `Beginners Regex tutorial <https://regexone.com/>`_ and `Online Regex testing website <https://regex101.com/>`_."
 
 Formatting
 ----------
@@ -235,6 +235,6 @@ nest formulas, for example ``concat(title("foo"), lower("Bar"))`` will produce
     "``title({{value}})``", "``title(""foo"")``", "``Foo``", "Titlecases a string."
     "``concat({{value}}[, {{value2}}]*)``", "``concat(""foo"", ""bar"")``", "``foobar``", "Concatenates two or more strings."
     "``round({{value}}, {{precision}})``", "``round(3.123, 0.1)``", "``3.1``", "Rounds ``{{value}}`` to the nearest ``{{precision}}``."
-    "``number({{value}}[, {{decimal_separator}}[, {{thousands_separator}}]])``", "``number(1234.56, "","", ""."")``", "123.4,56", "Formats {{value}} with an optional custom {{decimal_separator}} and {{thousands_separator}}. The default separators are ``.`` and ``,``."
+    "``number({{value}}[, {{decimal_separator}}[, {{thousands_separator}}]])``", "``number(1234.56, "","", ""."")``", "1.234,56", "Formats {{value}} with an optional custom {{decimal_separator}} and {{thousands_separator}}. The default separators are ``.`` and ``,``."
     "``metric_length({{value}}, {{precision}}, {{decimals}})``", "``metric_length(3.123, 0.1, 2)``", "``3.10``", "Rounds ``{{value}}`` to the nearest ``{{precision}}`` then displays using a certain amount of decimal places."
     "``imperial_length({{value}}, {{precision}}, {{input_unit}}, {{output_unit}})``", "``imperial_length(3.22, 4, ""foot"")``", "``3' - 3 3/4""``", "``The {{value}}`` may be specified either as ``foot`` or ``inch`` depending on ``{{input_unit}}``. The ``{{value}}`` is then rounded to the nearest ``1/{{precision}}`` inch then formatted using fractional feet and inches if ``{{output_unit}}`` is set to ``foot`` or just inches if ``{{output_unit}}`` is set to ``inch``."