The Law of EU External RelationsPieter Jan Kuijper, Jan Wouters, Frank Hoffmeister, Geert De Baere, Thomas Ramopoulos · First published 2016Open the Tome
From Treaty-Making to Treaty-BreakingPieter Jan Kuijper, James H. Mathis, Natalie Y. Morris-Sharma · First published 2015Open the Tome
Law of the European Union and the European CommunitiesPieter Jan Kuijper, Fabian Amtenbrink, Deirdre Curtin, Bruno De Witte, Alison McDonnell · First published 2006Open the Tome
Het GATT en het volkenrechtPieter Jan Kuijper, Jacques Steenbergen · First published 1994Open the Tome
De invloed der temperatuur op de ademhaling der hoogere plantenJan Kuijper · First published 1909Open the Tome
