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	Issue Date	Title	Author(s)	Type	Access
1	1990	On the random phase approximation based on the thermo field dynamics formalism	Yamamura, Masatoshi ; Providência, João da ; Kuriyama, Atsushi ; Fiolhais, Carlos	article	openAccess
2	1990	Application of the thermal boson expansion to the Heisenberg antiferromagnet MnF2	Brajczewska, Marta ; Fiolhais, Carlos ; Providência, João da	article	openAccess
3	1990	A note on thermal bosons	Providência, João da ; Fiolhais, Carlos	article	openAccess
4	1993	Discontinuous phase transition obtained with the thermal boson expansion	Fiolhais, Carlos ; Brajczewska, Marta ; Providência, João da	article	openAccess