Paradigms for on-line learning: a case study in the design and implementation of an asynchronous learning networks (ALN) course
1999 ◽
Vol 3
(4)
◽
pp. 11-18
1996 ◽
Vol 85
(3)
◽
pp. 253-262
◽
2002 ◽
Vol 18
(4)
◽
pp. 169-189
◽