-The [IBM MASS](http://www-01.ibm.com/software/awdtools/mass/linux/mass-linux.html) library
-consists of a set of mathematical functions for C, C++, and Fortran applications that are
-are tuned for optimum performance on POWER architectures.
+The [IBM MASS](https://www.ibm.com/support/home/product/W511326D80541V01/other_software/mathematical_acceleration_subsystem) library consists of a set of mathematical functions for C, C++, and Fortran applications that are tuned for optimum performance on POWER architectures.