VS2013数据库项目如何在解决方案中引用其他数据库项目

Working with VS2013 and doing my first database project solution. I have three existing databases on the same server. Quotes, Quoting and QuotingUi. Each have a few stored procedures that reference one of the other databases. This is done with database.schema.table (Quotes.dbo.Mytable) syntax and works well in SSMS and all production situations. QuotingUi has a number of views that pull data from Quoting using the same syntax. SPs and EF models have no problem with this. Working with VS2013 and doing my first database