Yakubovich SB, Saigo M. On the Mehler-Fock transform in $L_p$-space. Math. Nachr.. 1997;185:261-277.Edit

Srivastava H., Vasil'ev Y., Yakubovich SB. A class of index transforms with Whittaker's function as the kernel. Quart. J. Math. Oxford Ser. (2). 1998;49:375-394.Edit

Almeida J, Silva PV. On the hyperdecidability of semidirect products of pseudovarieties. Comm. Algebra. 1998;26:4065-4077.Edit

Petrich M., Silva PV. On directly infinite rings. Acta Math. Hungar.. 1999;85:153-165.Edit

Petrich M, Silva PV. On presentations of semigroup rings. Boll. Unione Mat. Ital. Sez. B Artic. Ric. Mat. (8). 1999;2:127-142.Edit

Petrich M, Silva PV. On quasi directly infinite rings. Acta Sci. Math. (Szeged). 1999;65:61-75.Edit

Dias A., Stewart I.. Symmetry-breaking Bifurcations of Wreath Product Systems. Journal of Nonlinear Science . 1999;9:671-695.Edit

Srivastava H., Tuan VK, Yakubovich SB. The Cherry transform and its relationship with a singular Sturm-Liouville problem. Q. J. Math.. 2000;51:371-383.Edit

Torgo L., da Costa J.. Clustered multiple regression. In: Kiers H.AL, Rasson J.P, Gronen P.JF, Schader M., editors. Data Analysis, Classification, and Related Methods.; 2000. 2. p. 217-222p. (Studies in Classification, Data Analysis, and Knowledge Organization).Edit

Almeida J, Steinberg B. On the decidability of iterated semidirect products with applications to complexity. Proc. London Math. Soc. (3). 2000;80:50-74.Edit

Sousa R, de Oliveira PM. Estimação de estado em modelos lineares por intervalos em tempo discreto: comparação numérica de dois procedimentos 2000.Edit

Petrich M, Silva PV. A functor from semigroups to rings. J. Pure Appl. Algebra. 2000;148:285-307.Edit

Dias A., Dionne B., Stewart I.. Heteroclinic Cycles and Wreath Product Symmetries. Dynamics and Stability of Sytems. 2000;15:353-385.Edit

Stewart I., Dias A. Hilbert Series for Equivariant Mappings Restricted to Invariant Hyperplanes. Journal of Pure and Applied Algebra. 2000;151:89-106.Edit

Estrada MF, de Sá CC, Queiró JF, Silva MC, Costa MJ. História da Matemática. Vol 1. Universidade Aberta ed. Lisboa : Universidade Aberta 2000.Edit

Dias A., Stewart I.. Invariant Theory for Wreath Product Groups. Journal of Pure and Applied Algebra. 2000;150:61-84.Edit

Oliveira A, Silva PV. Inverse automata and monoids and the undecidability of the Cayley subgraph problem for groups. Glasg. Math. J.. 2000;42:421-437.Edit

Costa JP, Soares C, Brazdil P., Costa JP. Measures to evaluate rankings of classification algorithms. In: DATA ANALYSIS, CLASSIFICATION, AND RELATED METHODS.; 2000. Edit

Soares C, Brazdil P., Costa JP. measures to evaluate rankings of classification algorithms. data analysis, classification, and related methods. 2000:119-124.Edit

Soares C., Brazdil P., Costa JP. Measures to evaluate rankings of classification algorithms. In: Kiers H.AL, Rasson J.P, Gronen P.JF, Schader M., editors. Data Analysis, Classification, and Related Methods.; 2000. 1. p. 119-124p. (Studies in Classification, Data Analysis, and Knowledge Organization).Edit

Soares C., Brazdil P., Costa JP. Measures to evaluate rankings of classification algorithms. In: Kiers H.AL, Rasson J.P, Gronen P.JF, Schader M., editors. Data Analysis, Classification, and Related Methods.; 2000. 1. p. 119-124p. (Studies in Classification, Data Analysis, and Knowledge Organization).Edit

Silva MC, Ribeiro RM. Reflexão sobre um teorema de Jacques Bernoulli relativo a secções cónicas. Vol 139 SPM 2000.Edit

Petrich M, Silva PV. Relationship of certain rings of infinite matrices over integers. Boll. Unione Mat. Ital. Sez. B Artic. Ric. Mat. (8). 2000;3:347-365.Edit

Petrich M, Silva PV. Relatively free $^\ast$-bands. Beiträge Algebra Geom.. 2000;41:569-588.Edit

Petrich M, Silva PV. Relatively free bands. Comm. Algebra. 2000;28:2615-2631.Edit