Tsap, Yurii, and Yuliya Kopylova. “Boundary Conditions and MHD Equilibrium of Force-Free Magnetic Flux Ropes”. Acta Astrophysica Taurica, vol. 5, no. 1, Mar. 2024, pp. 1-4, https://doi.org/10.34898/aat.vol5.iss1.pp1-4.