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$\sigma$ models, duality transformations and Higgs potential in extended supergravities

Phys. Lett. 161B 1985 91

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L. Castellani, A. Ceresole, R. D'Auria, S. Ferrara,P. Fre', E. Maina

The complete N=3 matter coupled supergravity

Nucl. Phys. B268 1986 317

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S. Ferrara, P. Fre', M. Porrati

First order higher curvature supergravities and effective theories of strings

Annals of Physics 175 1987 112

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R. D'Auria, P. Fre'

Minimal 10D anomaly free supergravity and the effective superstring theory

Phys. Lett. 200B 1988 63

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R. D'Auria, P. Fre', M. Raciti, F. Riva

Anomaly free supergravity in D=10: I) The Bianchi identities and the bosonic lagrangian

International Journal of Modern Physics A3 1988 953

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What we learn on the heterotic string vacua from anomaly free supergravity

Phys. Lett. B196 1987 349

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Duality in superspace and Anomaly free supergravity

Modern Physics Letters A3 1988 673

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Four dimensional superstrings live on group manifolds

Phys. Lett. B208 1988 203

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P. Fre', F. Gliozzi

Superstring theory on smooth manifolds with a non abelian Lie group as covering space

Nucl. Phys. B 326 1989 411

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R. D'Auria, P. Fre', I. Pesando, G. de Matteis

Superspace constraints and Chern-Simons cohomology in d=4 superstring effective theories

Int. Jour. of Mod. Phys. A 14 1989 3577

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P. Fre',

The Geometric interpretation of fermionic superstrings and modular invariance

1988 Cavalese Meeting (Trento) Proceedings edited by Cerdonio, Cianci, Francaviglia, Toller

1989 World Scientific

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R. D'Auria, P. Fre'

The Group Manifold formulation of 4D superstrings and the geometry of the linear multiplet coupling

Seminar given at the CIME Course on "Global Geometry and Mathematical Physics", Montecatini, 6th-12th July 1988 DFTT 32/88 1988 unpublished

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\bf Supergravity and Superstrings: a geometric perspective

Book in three volumes, six parts and fifty-two chapters published by World Scientific 1991

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P. Fre', F. Gliozzi, M. Rego Monteiro

No leftons for heterotic superstrings

Phys. Lett. B219 1989 419

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P. Fre', F. Gliozzi, A. Piras

Improved formulation of the GNO fermionization theorem

Modern Physics Letters A4 1989 1013

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R. D'Auria, P. Fre', F. Gliozzi, A. Pasquinucci

$4$D Fermionic superstrings from thirteen dimensions: $\sigma$-model and superconformal properties

Nucl. Phys. B334 1990 24

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Type II superstrings on twisted group-manifolds and their heterotic counterparts

Int. Jour. Mod. Phys. 5 A 1990 989

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$(2,2)$-compactifications of superstring theory on $SU(2)^3$ groupfolds

Int. J. Mod. Phys. A6 1991 1149

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L. Castellani, P. Fre', F. Gliozzi, M. Rego Monteiro

Free Phases and Mirror Symmetry in Fermionic superstrings

Phys. Lett. B249 1990 229

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P. Fre'

Differential Geometry and the Lagrangians of Superstring Theory in Lagrange bicentennial volume "200 years after Lagrange", 1991 (North Holland) Francaviglia and Rassia eds.

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A. Ceresole, P. Fre', F. Gliozzi, S. Vinti

Complex Free Fermion Superstrings as Groupfold Compactifications

Int. Journ. Mod. Phys. 6 1991 4843

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P. Fre'

(2,2)-vacua, Free Fermions and Groupfolds in $Strings 90$, Proceedings of the $ Strings 90 $ Conference, Texas A and M, College Station, World Scientific, Arnowitt et al eds. page 220

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P. Fre', F. Gliozzi, M. Rego Monteiro, A. Piras

A moduli dependent Lagrangian for (2,2) theories on Calabi-Yau N-folds

Class. and Quan. Grav. 1991 8 1455