URL: sisbib.unmsm.ed ... http://sisbib.unmsm.edu.pe/bibvirtual/Publicaciones/risi/portada.htm
URL: revistasinvesti ... http://revistasinvestigacion.unmsm.edu.pe/index.php/sistem
URL: sisbib.unmsm.ed ... http://sisbib.unmsm.edu.pe/bibvirtual/Publicaciones/risi/portada.htm
URL: revistasinvesti ... http://revistasinvestigacion.unmsm.edu.pe/index.php/sistem
Google: www.google.com/ ... https://www.google.com/search?q=ISSN+%221816-3823%22
Bing: www.bing.com/se ... https://www.bing.com/search?q=ISSN+%221816-3823%22
Yahoo: search.yahoo.co ... https://search.yahoo.com/search?p=ISSN%20%221816-3823%22
CROSSREF: search.crossref ... https://search.crossref.org/?q=+1816-3823