Bibliographical
Abstracting and reviewing service in pure and applied mathematics maintained by the European Mathematical Society.
Scopus (EISZ) 
It indexes all fields of science, technology, medicine, social sciences, arts and humanities. It is worth using primarily for checking citations and the position of researchers and institutions in the given field.
Web of Science (EISZ)
It indexes all fields of science. It is worth using primarily for checking citations and the position of researchers and institutions in the given field.