accULL: An OpenACC Implementation with CUDA and OpenCL Support. - Ruymán Reyes; Iván López-Rodríguez; Juan J. Fumero; Francisco de Sande (Euro-Par, 2012)

Directive-based Programming for GPUs: A Comparative Study. - Ruymán Reyes; Iván López-Rodríguez; Juan J. Fumero; Francisco de Sande (HPCC-ICESS, 2012)

accULL: An User-directed Approach to Heterogeneous Programming. - Ruymán Reyes; Iván López-Rodríguez; Juan J. Fumero; Francisco de Sande (ISPA, 2012)

A preliminary evaluation of OpenACC implementations. - Ruymán Reyes; Iván López-Rodríguez; Juan J. Fumero; Francisco de Sande (J. Supercomput., 2013)