@ARTICLE {, title = {Minitheory of definite integral}, author = {Riečan, Beloslav}, journal = {Obzory matematiky, fyziky a informatiky}, year = {2014}, volume = {43}, number = {1}, pages = {25--37}, issn = {1335-4981}, abstract = {In the paper an elementary theory of the integral f(x) dx for functions f : [a, b] -> R is presented. We use the Riemann construction of the integral, of course, we show that from the practical point of view it is sufficient to consider continuous (partially continuous) functions only.}, }