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		| Paper: | 
		Case studies of magnetic topology evolution in active regions | 
	 
	
		| Volume: | 
		155, Second Advances in Solar Physics Euroconference: Three-Dimensional Structure of Solar Active Regions | 
	 
	
		| Page: | 
		229 | 
	 
	
		| Authors: | 
		Cacciani, A.; di Martino, V.; Hanslmeier, A.; Messerotti, M.; Moretti, P. F.; Pettauer, Th.; Veronig, A. | 
	 
	
	
		| Abstract: | 
		We give a preliminary report on the evolution of the magnetic field topology extrapolated in the current-free approximation for two solar active regions observed through an MOF imaging magnetograph. | 
	 
	
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