Reitsma, Rients, uit Baarderadeel Centrifugal and centripetal forces in the early Dutch Republic. The States of Overijssel 1566-1600 Amsterdam Rodopi 1982

Wolffersdorf, Henr. Gotl. de; Praeses: Hassen, Martin Dissertatio ex jure gentium de iustis imminentem hostem occupandi causis, quam rectore magnificentissimo serenissimo principe ac domino Friderico Augusto, principe regio atquw electorali, preaside Martino Hassen, moralium ac civil. p.p. extraordin. in ill