Nikodem, M.P. and Abramski, K.M. 2009. Injection-Seeded Actively Mode-locked Erbium-Doped Fiber Ring Laser for Frequency Measurement in Telecommunication Band. Photonics Letters of Poland. 1, 1 (Mar. 2009), pp. 19–21. DOI:https://doi.org/10.4302/photon. lett. pl.v1i1.2.