Papers in International Journals

• T.Tang; S.McKee; Diogo, Teresa (1992)  Product integration methods for an integral equation with logarithmic singular kernel, Appl. Numer. Math. Applied Numerical Mathematics: 9, 259--266.

• Kulikov, Gennady Yu (1992) A method for the numerical solution of the autonomous Cauchy problem with an algebraic restriction of the phase variables Moscow University Mathematics Bulletin: 47(1), 14-18.

• Gomes, Gracinda M. S. (1992) Group congruences on eventually inverse semigroup Portugal. Math.: 49 (4), 417-428.

• Fountain, J.B.; Gomes, Gracinda M. S. (1992) Left proper E-dense monoids J. Pure Appl. Algebra: 80, 1-27.

• Gomes, Gracinda M. S.; Howie, J.M. (1992) On the ranks of certain semigroups of order-preserving transformations Semigroup Forum: 45, 272-282.

• Diogo, Teresa; McKee, S; Tang, T. (1991) A Hermite-type collocation method for the solution of an integral equation with a certain weakly singular kernel, IMA J. Numer. Anal.  IMA J. Numerical Analysis: 11, 595-605.

• Fountain, J.B.; Gomes, Gracinda M. S. (1990) The Szendrei expansion of a semigroup Mathematika: 37, 251-260.

• Gomes, Gracinda M. S. (1988) Orthodox congruences on regular semigroups Semigroup Forum: 37, 149-166.

• Gomes, Gracinda M. S.; Howie, J.M. (1987) Nilpotents in finite symmetric inverse semigroups Proc. Edinburgh Math. Soc.: 30, 383-395.

• Gomes, Gracinda M. S.; Howie, J.M. (1987) On the ranks of certain finite semigroups of transformations Math. Proc. Cambridge Philos. Soc.: 101, 395-403.

• Gomes, Gracinda M. S. (1986) Some results on congruences on R-unipotent semigroups Semigroup Forum: 33, 175-185.

• Gomes, Gracinda M. S. (1986) The lattice of R-unipotent congruences on a regular semigroup Semigroup Forum: 33, 159-173.

• Gomes, Gracinda M. S. (1985) R-unipotent congruences on regular semigroups Semigroup Forum: 31, 265-280.

• Gomes, Gracinda M. S. (1983)  On left quasinormal orthodox semigroups Proc. Roy. Soc. Edinburgh: 95A, 59-71.

• Blyth, T. S.; Gomes, Gracinda M. S. (1983) On the compatibility of the natural order on a regular semigroup Proc. Roy. Soc. Edinburgh: 94A, 79-84.

• Galvão, M. Luísa (1978) Ideals in the semiring N Portugal. Math.: 37, no 1-2, 113-117.

• Galvão, M. Luísa (1978) Les relations de congruence sur le demianneau N des nombres naturels Period. Math. Hungar.: 9, no 3, 231-235.

• Almeida Costa, A.; Galvão, M. Luísa (1973) Sur les demianneaux réticulés Rev. Fac. Ciências de Lisboa: 2ª Série A, Vol XIV, Fasc 2º, 195-208.

• Almeida Costa, A.; Galvão, M. Luísa (1972) Sur les relations de invariance dans les treillis Rev. Fac. Ciências de Lisboa: 2ª Série A, Vol XIV, Fasc. 1º, 45-60.

• Galvão, M. Luísa (1960) Sur les ideaux réguliers d'un semianneau Rev. Fac. Ciências de Lisboa: 2ª Série A, Vol VIII, Fasc. 1º, 169-173.

• Galvão, M. Luísa (1959) On the theory of residuals Rev. Fac. de Ciências de Lisboa: 2ª Série A, Vol VII, 283-300.

• Lehtonen, Erkko; Waldhauser, Tamás () Associative spectra of graph algebras II. Satisfaction of bracketing identities, spectrum dichotomy Journal of Algebraic Combinatorics.

• Adérito Araújo; Jorge Cerdeira; N. D. Lopes; Ana Moura () Minimizing costs in signal provision by communication antennas along a railway line