Sobom M. Somé from Thomas Sankara University - Ouagadougou (2023/10, LaST); Marcelo Bourguignon Pereira from Universidade Federal do Rio Grande do Norte - Natal (2022/05-07, FeProMath of FBFCM); Sylia Chekkal from University of Bejaia (2019/06, LAMOS); Subrata Chakraborty from Dibrugarh University (2017/03, LMB); Rahma Abid from University of Sfax (2019/12 & 2019/08; 2018/06, AUF Maghreb & LmB; 2017/05, BAT - Sfax); Francial G. Libengué (2017/06, AUF Centrafrique); Wagner H. Bonat from University of Odense and Federal University of Parana - Curitiba (2016/04-06 - Danemark & Brasil); Pere Puig from University Autonomia de Barcelona (2015/02, UFC Pr.Inv.); Aymen Hassine from University of Sfax (2015/05, Sfax - Bourse Alternance de Tunisie); Nawel Belaid from University of Bejaia (2016/05-06, 2015/04, LAMOS); Said Beddek from University of Bejaia (2015/01-03, LAMOS); Blaise Somé from University of Ouagadougou (2014, Ouagadougou); Pierre Clovis Nitiema from University Ouaga II (2013, Ouaga II); Wanbitching Eric Wansoué from University of Maroua (2015-2016, AUF; 2014-2015, AUF; 2013, ENS); Nabil Zougab from University of Bejaia (2011, 2013, LAMOS); Silvio S. Zocchi from University of Sao Paulo - ESALQ (2011, UFC); Smaïl Adjabi from University of Bejaia (2010, 2013, 2015, 2017/06, 2018/05, 2023/09, LAMOS); Marta Pérez-Casany from Universitat Politécnica de Catalunya (2009, 2010, UFC); Bent Jørgensen from University of Southern Denmark (2008, 2009, UPPA Pr.Inv.; 2012 UFC Pr.Inv.); Belkacem Abdous from Université Laval (2009, 2008 CNRS-UPPA); Clarice G.B. Demétrio from University of Sao Paulo - ESALQ (2008, UPPA Pr.Inv.); Mohamed Zarai, Afif Masmoudi and Abdelatif Hassairi from University of Sfax (2002, 2004, 2005, Tunisie & UPPA); etc.
University of Aarhus (1992); McGill University - Montréal (1993, 1995); University of British Columbia - Vancouver (1996/08 BJ; 2016/07 HJ); Ecole Nationale de la Statistique et de l'Analyse de l'Information à Bruz (2000, 2001); University of Sfax (2001, 2003, 2004, 2016/10, 2018/02); University 7 Novembre - ESSAI, Carthage (2004); University of Sao Paulo - Escola Superior de Agricultura Luiz de Queiros, Piracicaba - SP (2004/01, 2005/03, 2006/02, 2008/02, 2010/03, 2013/01); University of Burundi - Bujumbura (2007); Université Laval - Québec (2009); Université Marien Ngouabi - Brazzaville (2009/12, 2010/12) & University of Kinshasa (2009/12); University of Southern Denmark (SDU) - Odense (2010/11, 2011/10); University Abderrahmane Mira of Bejaia (2013/02, 2016/03, 2018/03); University of Ouagadougou (2013/06); Université Sciences et Techniques de Masuku, Franceville (2014/03, 2024/05); Centre de Recerca Matemàtica (CRM) - UAB, Bellaterra - Barcelona (2015/10-11): Invited visiting researcher of Intensive Research Program - IRP Statistical Advances for Complex Data; University of Haifa (2015/11) Invited visiting researcher of Actuarial Research Center at Haifa University; Lampung University - Indonesia (2018/08); Universidade Federal do Rio Grande do Norte - Natal (April-May 2023, Prof. Marcelo Bourguignon Pereira) Invited visiting researcher, financed by “Brazilian-French Network in Mathematics”; etc.