@article{article, title  = {{Photospheric high-frequency acoustic power excess in sunspot umbra:
  signature of magneto-acoustic modes}},

 url = {{http://eprints.whiterose.ac.uk/99764/ }},

 year = {{2009}},

 month = {{9}},

 author = {{Zharkov S and Shelyag S and Fedun V and Erdélyi R and Thompson MJ}},

 note = {{Accessed on 2024/09/20}}}