Jaworska OH, Ertman S. Photonic bandgaps in selectively filled photonic crystal fibers. Photonics Lett. Pol. [Internet]. 2017 Sep. 30 [cited 2024 Nov. 20];9(3):pp. 79-81. Available from: http://m.photonics.pl/PLP/index.php/letters/article/view/9-29