Do, H. Q., V. Duong, N. T. H. Lien, and V. M. Katarkevich. “Picosecond Pulse Generation by Second-Order Distributed Feedback Dye Laser”. Communications in Physics, vol. 29, no. 3SI, Oct. 2019, p. 325, doi:10.15625/0868-3166/29/3SI/14264.