As per [here](http://matwbn.icm.edu.pl/ksiazki/cc/cc35/cc3516.pdf) or [here](http://www.sciencedirect.com/science/article/pii/S0957417410011863), QTCBS is already defined as QTCB11. Similar issue may exist with QTCC also. @yianni @cdondrup
As per here or here, QTCBS is already defined as QTCB11.
Similar issue may exist with QTCC also. @yianni @cdondrup