Dear Readers,

The following two articles were planned to be part of the Special Issue on EuroMPI but were mistakenly published in vol. 95, issue 12 (2013):

Torsten Hoefler, James Dinan, Darius Buntinas, Pavan Balaji, Brian Barrett, Ron Brightwell, William Gropp, Vivek Kale, Rajeev Thakur (2013) MPI + MPI: a new hybrid approach to parallel programming with MPI plus shared memory. Computing 95(12):1121–1136

Wesley Bland, Aurelien Bouteiller, Thomas Herault, Joshua Hursey, George Bosilca, Jack J. Dongarra (2013) An evaluation of User-Level Failure Mitigation support in MPI. Computing 95(12):1171–1184

The online version of the original articles can be found at 10.1007/s00607-013-0324-2 and 10.1007/s00607-013-0331-3, respectively.