http://dx.doi.org/10.1016/0169-2046(88)90022-9 | | | | DOI Link |
http://ac.els-cdn.com/0169204688900229/1-s2.0-0169[...] | 08/02/2012 | PDF Reader | Item is within a limited-access website | |
http://www.sciencedirect.com/science/article/pii/0[...] | 12/15/2016 | PDF Reader | Item is within a limited-access website | |