“Few-cycle laser wakefield acceleration on solid targets with controlled plasma scale length”; N. Zaïm, F. Böhle, M. Bocoum, A. Vernier, S. Haessler, X. Davoine, L. Videau, J. Faure and R. Lopez-Martens, Physics of Plasmas 26, 033112 (2019)
https://aip.scitation.org/doi/10.1063/1.5084783