A recent publication of the Finnish Institute at Athens:
Maria Niku, The Official Status of the Foreign Residents in Athens, 322-120 B.C.. Papers and Monographs of the Finnish Institute at Athens, 12. Helsinki 2007. 181 pp., app. ISBN 978-951-98806-7-9 [worldcat record]).
Available through Tiedekirja, Helsinki (www.tiedekirja.fi).