Academic Resource Index
> CrossRef DOIs Databases
> INDEX COPERNICUS
> Open Academic Journals Index (OAJI)
> journal index – Academic Journals Web Addresses
> International Impact Factor Services (IIFS)
> Directory of Research Journal Indexing (DRJI)
> Regional Information Center for Science & Technology (RICeST), Iran.
> Science Impact Factor (SIF)
> Google Scholar
> Universal Impact Factor
> Worldcat
> UK Index
> Academic Resource Index
> Scientific Journal Impact Factor (SJIF)
> researchgate
> academia
> Research & Consulting
