Navarro Medina, Fermín and Sanz Andres, Angel Pedro and Pérez Grande, María Isabel and Martínez Muelas, Alejandro and Vega Ramiro, Enrique and Rodriguez Plaza, Miguel and Iglesias Dia, Ignacio Jorge and Andres Alguacil, Alvaro and Alonso Gimeno, Diana (2011). The ballast pick-up problem. A theoretical approach and two experimental campaigns. In: "13th International Conference on Wind Engineering", 10/07/2011 - 15/07/2011, Amsterdand, Paises Bajos.