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Gama SM, Frisch U, Scholl H. The two-dimensional Navier-Stokes equations with a large-scale instability of the Kuramoto-Sivashinsky type: numerical exploration on the Connection. Journal of Scientific Computing. 1991;6(4):425-452.Edit

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Almeida J. An elementary proof that finite groups are projectively torsion-free. Portugal. Math.. 1990;47:437-444.Edit

Almeida J. The equation $\bf PX=\bf PJ$. In: Proceedings of the International Symposium on the Semigroup Theory and its Related Fields (Kyoto, 1990). Shimane Univ., Matsue; 1990. 1. p. 1-11p. Edit

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Almeida J. On pseudovarieties, varieties of languages, filters of congruences, pseudoidentities and related topics. Algebra Universalis. 1990;27:333-350.Edit

Almeida J. Semidirectly closed pseudovarieties of locally trivial semigroups. Semigroup Forum. 1990;40:315-323.Edit

Bokowski J, de Oliveira AG. Simplicial convex $4$-polytopes do not have the isotopy property. Portugal. Math.. 1990;47:309-318.Edit

Kha\u\i NT, Yakubovich SB. Some two-dimensional integral transformations of convolution type. Dokl. Akad. Nauk BSSR. 1990;34:396-398, 474.Edit

Almeida J. The algebra of implicit operations. Algebra Universalis. 1989;26:16-32.Edit

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Labouriau IS. Degenerate Hopf bifurcation and nerve impulse. II. SIAM J. Math. Anal.. 1989;20:1-12.

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Almeida J. Equations for pseudovarieties. In: Formal properties of finite automata and applications (Ramatuelle, 1988). Vol 386. Springer, Berlin; 1989. 1. p. 148-164p. (Lecture Notes in Comput. Sci.; vol 386).Edit

Almeida J, Azevedo A. The join of the pseudovarieties of $\scr R$-trivial and $\scr L$-trivial monoids. J. Pure Appl. Algebra. 1989;60:129-137.Edit

Almeida J. On power varieties of semigroups. J. Algebra. 1989;120:1-17.Edit

Almeida J. Residually finite congruences and quasi-regular subsets in uniform algebras. Portugal. Math.. 1989;46:313-328.Edit

Almeida J. Semidirect products of pseudovarieties from the universal algebraist's point of view. J. Pure Appl. Algebra. 1989;60:113-128.Edit

Basto-Gonçalves J. Control of a neoclassic economic model. Portugal. Math.. 1988;45:417-428.

Tuan VK, Yakubovich SB. Kantorovich-Lebedev transformation of functions that admit exponential growth. Mat. Fiz. Neline\uın. Mekh.. 1988:6-9, 85.Edit

Almeida J. A notion of branching rank for semilattices with descending chain condition. Order. 1988;4:397-409.Edit

Cordovil R, A. de Oliveira G, M. Moreira L. Parallel projection of matroid spheres. Portugal. Math.. 1988;45:337-346.Edit

Almeida J. On pseudovarieties of monoids. In: Semigroups, theory and applications (Oberwolfach, 1986). Vol 1320. Springer, Berlin; 1988. 1. p. 11-17p. (Lecture Notes in Math.; vol 1320).Edit

da Silva MR, Rodrigues MJ. A simple alternative principle for rational τ-method approximation. In: Nonlinear numerical methods and rational approximation (Wilrijk, 1987). Vol 43. Reidel, Dordrecht; 1988. 4. p. 427-434p. (Math. Appl.; vol 43).Edit