A Flexible Payment Scheme and Its User-Role Assignment
2018 ◽
Vol 8
(1)
◽
pp. 1-10
Keyword(s):
2019 ◽
Vol 2
(1)
◽
2010 ◽
Vol 31
(3)
◽
pp. 551-569
◽
Keyword(s):
2009 ◽
Vol 53
(12)
◽
pp. 1980-1996
◽
Keyword(s):