Here you have it, from the begenning just 2articles. One of them is from Dean Ripa. I could not find from him his real revision but this is also interesting I think:) I have several articles about that Bushmsters (envenomations, some breeding, their venom etc. ). I can upload them too if you want. for example create new topic and post all articles.
You will need password fot both of that documents. password: bushmaster
These links are in czech language but I think that you can manage it:)
The second article is little bit older...2004 I think
http://www.ulozto.cz/9042150/deanripa-geographicaldistribution-pdf
http://www.ulozto.cz/9042149/revisao-de-lachesis-pdf

Thanks goes out to Jaroslav Karhanek for an excellent reference on the Lachesis group,
the article on Lachesis melanocephala and the geographical distribution -pdf. was eye opening and refreshing.

sincerely ,

Albert.