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	Issue Date	Title	Author(s)	Type	Access
1	1987	Application of the thermal boson expansion to the Heisenberg ferromagnets EuO and EuS	Fiolhais, Carlos ; Brajczewska, Marta ; Providência, João da	article	openAccess
2	1987	Variational formulation of the Vlasov equation	Providência, João da ; Fiolhais, Carlos	article	openAccess
3	1987	Variational principles in quantum statistical mechanics	Providência, João da ; Fiolhais, Carlos	article	openAccess