D.J.P. Morris, D.A. Tennant, S.A. Grigera, B. Klemke, C. Castelnovo, R. Moessner, C. Czter-nasty, M. Meissner, K.C. Rule, J.-U. Hoffmann, K. Kiefer, S. Gerischer, D. Slobinsky, and R.S. Perry (2009-09-03). "Dirac Strings and Magnetic Monopoles in Spin Ice Dy2Ti2O7". Science, DOI: 10.1126/science.1178868. பார்க்கப்பட்ட நாள் 2009-09-04. {{cite web}}: Unknown parameter |submitted= ignored (help)CS1 maint: multiple names: authors list (link)