Pressure effect on the superconductivity of Ca1−xLaxFeAs2 (x = 0.18) single crystal W. Zhou, X. Z. Xing, X. Zhou, M. X. Xu and Z. X. Shi EPL, 109 3 (2015) 37005 Published online: 19 February 2015 DOI: 10.1209/0295-5075/109/37005