how to get store view id (view) by group_id (store) in magento? basically i want to list sotre views by their store id.

`Mage::app()->getStores()` 

will get all store views but i want to filter it by specific store.

like `Mage::app()->getStores()-byGroupId($store_group_id);` 

so i can list all store views under a specific store.

thanks,