Referencing Telerik from Portable Library

Hello.

I've created a portable library that targets both windows 8.1 and windows phone 8.1.

Next, I want to develop some classes that use RadDataboundListBox. Which telerik libraries should I reference to?

I see three folders at C:\Program Files (x86)\Telerik\UI for Windows Universal Q1 2015\Binaries : Common, Windows 8.1, Windows Phone 8.1.

I successfully referenced libraries from "Windows 8.1" folder, but, when I use it on "Windows Phone 8.1" project it behaves a little bit different from when I use libraries from "Windows Phone 8.1" folder.

So again, what is the proper way to reference Telerik from portable library that targets Windows 8.1 and Windows phone 8.1