(2016) SAI-Newsletter, no.8 (February 2016).
(2016) SAI-Newsletter, no.9 (November 2016).
(2015) SAI-Newsletter, no. 6 (January 2015).
(2015) SAI-Newsletter, no.7 (July 2015).
Klonner, Stefan (2001) Essays on rotating savings and credit associations.