Indexing and Abstracting

PKP (Public Knowledge Project)

CAS (Chemical Abstracts Services)

San José State University (California, United States) library

Google Scholar, USA

Electronic Journals Index, USA

Index Copernicus, Poland

Genamics Journal Seek, USA

JournalTOCs, USA

Research Bib, Japan

BASE (Bielefeld Academic Search Engine), Germany

Scientific Index Services (SIS)

WorldWideScience

ROAD - Directory of Open Access Scholary Resources

Zeitschriftendatenbank (ZDB)

Academic Journals Database

Journals Directory

Advanced Sciences Index

OTH Amberg-Weiden Library

Technical University of Braunschweig Library

Leipzig University Library