I have been asked to get the required permission for the figures reproduced in my review paper from other publications. All the figures which are reproduced from other publications appropriately cite the original works and authors with in-text citations but do not indicate reprint approval from the respective publishers.
What is the procedure to get such approvals? How can I get permission for the figures reproduced in a new submission?
Some of these figures are from my previous works. Should I get any approval for those figures, too?