@article{Brajsa:196, author = "Brajsa, R. and Woehl, H. and Vrsnak, B. and Ruzdjak, V. and Clette, F. and Hochedez, J.-F.", title = "{Solar differential rotation determined by tracing coronal bright points in SOHO-EIT images. I. Interactive and automatic methods of data reduction?}", year = "2001", }