Albertina icome Praha s.r.o. [
]
BMJ Publishing Group [
A3]
Cosmotron Bohemia, s.r.o. [
C1]
Economist Intelligence Unit (EIU) [
C2]
IHS Technical Indexes [
A1]
Ovid Technologies Ltd. [
B2]
Oxford University Press [
B1]
ProQuest Information & Learning [
B3]
Springer-Verlag GmbH [
B5]
Ústav výpočetní techniky UK [
C3]