Linear regression of concrete mix design components for strengths between 250 and 280 kg/cm² by applying the ACI Method and the Porrero Method. Gaceta Técnica [Internet]. 2026 Jul. 8 [cited 2026 Jul. 23];27(2):22-43. Available from: https://revistas2.uclave.org/index.php/gt/article/view/5928