@conference {, title = {Railway line impedance. calculation based on short-circuit measurements}, booktitle = {International Congress on Rail Transport Technology ICRT2011.}, volume = {1}, year = {2011}, month = {06/2011}, pages = {1-4}, chapter = {1}, address = {Zaragoza, Espa{\~n}a}, isbn = {D.L. Z-2.277-2011.}, author = {F. Espinosa and J.A. Jimenez and J.C. Garcia and I.Fernandez and R. Lopez and E. Santiso} }