“?MINERAL ACID EFFECT ON THE TRACE ELEMENT DETERMINATION IN LICHEN CERTIFIED REFERENCE MATERIAL AND ALGAE BY INDUCTIVELY COUPLED PLASMA ~ TOMIC EMISSION SPECTROMETRY”. 2000. Biological Sciences - PJSIR 43 (3): 162-67. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/2021.