Dinh, K. B., K. A. Tran, T. H. Chau, V. K. Truong, H. B. Nguyen, H. T. Nguyen, T. P. Ho, and L. V. Dao. “Generation and Application of Four-Wave Mixing in Collinear High Harmonic Generation”. Communications in Physics, vol. 33, no. 2, Apr. 2023, p. 123, doi:10.15625/0868-3166/17928.