Semigrupo nulo (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Semigrupo nulo" in Portuguese language version.

refsWebsite

Global rank Portuguese rank

low place

low place

wikipedia.org

en.wikipedia.org

M. Kilp, U. Knauer, A.V. Mikhalev, Monoids, Acts and Categories with Applications to Wreath Products and Graphs, De Gruyter Expositions in Mathematics vol. 29, Walter de Gruyter, 2000, ISBN 3-11-015248-7, p. 19