Martínez-ÁlvarezP., Rodríguez-CeinósS., Martín-GarcíaJ., and DiezJ. J. “Monitoring Endophyte Populations in Pine Plantations and Native Oak Forests in Northern Spain”. Forest Systems, Vol. 21, no. 3, Nov. 2012, pp. 373-82, doi:10.5424/fs/2012213-02254.