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@@ -99,6 +99,8 @@ It uses the standard Boot protocol by default, but it is also able to use the Re
 
 The [PS4 library](#ps4-library) also uses this class to handle all Bluetooth communication.
 
+For information see the following blog post: <http://blog.tkjelectronics.dk/2013/12/bluetooth-hid-devices-now-supported-by-the-usb-host-library/>.
+
 ### [SPP library](SPP.cpp)
 
 SPP stands for "Serial Port Profile" and is a Bluetooth protocol that implements a virtual comport which allows you to send data back and forth from your computer/phone to your Arduino via Bluetooth.
@@ -130,6 +132,8 @@ Simply create the PS4BT instance like so: ```PS4BT PS4(&Btd, PAIR);``` and then
 
 It should then automatically pair the dongle with your controller. This only have to be done once.
 
+For information see the following blog post: <http://blog.tkjelectronics.dk/2014/01/ps4-controller-now-supported-by-the-usb-host-library/>.
+
 ### PS3 Library
 
 These libraries consist of the [PS3BT](PS3BT.cpp) and [PS3USB](PS3USB.cpp). These libraries allows you to use a Dualshock 3, Navigation or a Motion controller with the USB Host Shield both via Bluetooth and USB.