Gąsieniec, Leszek
Levcopoulos, Christos
Lingas, Andrzej
Pagh, Rasmus
Tokuyama, Takeshi
Funding for this research was provided by:
Vetenskapsrådet (621-2011-6179)
Japan Society for the Promotion of Science ((B) 15H02665, 24106007)
Article History
Received: 2 November 2015
Accepted: 11 August 2016
First Online: 22 August 2016