Pressure broadening and frequency shift of the D1 and D2 lines of K in the presence of Ne and Kr Xulin Wang, Yao Chen, Wei Quan, Haotian Chi and Jiancheng Fang Eur. Phys. J. D, 72 2 (2018) 32 Published online: 06 February 2018 DOI: 10.1140/epjd/e2017-80383-3