Reference

Hans-Otto Baral, R. Galan, J. Lopez, F. Arenal, Osvaldo Villarreal M., V. Rubio, J. Collado, G. Platas, Pelaez (2006): Hymenoscyphus crataegi (Helotiales), a new species from Spain and its phylogenetic position within the genus Hymenoscyphus. – Sydowia – 58: 145 - 162.