What should be the level permissions to see a publishing page on a site? I've tried with restricted readers and read and I cannot see the publishing pages, how that works?
First, ensure that page has been published at least once. Without a published version, nobody cant see the page unless you have created the page.
By the way, here is a complet guide to Sharepoint Permissions: User permissions and permission levels in SharePoint 2013 https://technet.microsoft.com/en-us/library/cc721640.aspx
hope it helps.