Update readme.md

Author: tobya

readme.md

@@ -1,11 +1,11 @@
 # MSSQL Dateformat Fixer
 
-There is an international date format `Y-m-d` that is supposed to be universal, however the MSSQL implementation is flawed
+There is an [international date format (ISO standard)](https://www.iso.org/iso-8601-date-and-time-format.html)  (YYYY-MM-DD) `Y-m-d` that is supposed to be universal, however the MSSQL implementation is flawed
 and is NOT universal and incorrectly interprets `Y-m-d`  as `Y-d-m` which is beyond idiotic.
 Laravel uses `Y-m-d` as their international format, which can lead to errors depending on SQL SERVER Settings.
 
 There is one format `Ymd` which is absolutely gauranteed to always be interpreted by SQLServer as `Ymd`.  This command patches the file in 
-illuminate library to use `Ymd` instead of `Y-m-d`.  I [Requested]() that the change be made in the illuminate library but it was felt the change
+illuminate library to use `Ymd` instead of `Y-m-d`.  I [Requested](https://github.com/laravel/framework/issues/49074) that the change be made in the illuminate library but it was felt the change
 was too big to be made. 
 
 I hope this is helpful to those of you out there using MSSQL with PHP/Laravel.
@@ -46,3 +46,10 @@ This is due to the fact that whenever `composer update` or `composer install` is
 is updated it will overwrite the `SqlServerGrammar.php` with the origional version, so it is necessary to call
 the command whenever this has the potential of happening.  If no change has been made to the file it will
 not be modified.
+
+#### Further reading on why this is necessary
+
+This is discussed in several places online
+
+ - [sqlblog.org/2009/10/16/bad-habits-to-kick-mis-handling-date-range-queries](https://sqlblog.org/2009/10/16/bad-habits-to-kick-mis-handling-date-range-queries)
+ - [stackoverflow.com/questions/19565320/why-is-sql-server-misinterpreting-this-iso-8601-format-date](https://stackoverflow.com/questions/19565320/why-is-sql-server-misinterpreting-this-iso-8601-format-date)