I am not sure what you are trying to do here Oman is the main author in most of them I count ten papers cited all dating to 2006 2009 with one exception 2003 and Oman is listed as author in ten out of ten papers with varying co authors This means that there is one group of authors churning out papers on PM publish or perish style Any evidence that these papers had any kind of impact or is this the academic equivalent of writing to dev null