TY - RPRT TI - Gradient free active subspace construction using Morris screening elementary effects AU - Lewis, Allison AU - Smith, Ralph AU - Williams, Brian (ORCID:0000000234654972) PY - 2016 DO - 10.1016/j.camwa.2016.07.022 UR - https://www.osti.gov/biblio/1657294 ID - 1657294 ER -