http://www.chemweb.com/forums

I suggest you try to search chemweb.com journals because my usial search engine PubMed comes back with one paper

Farmatsiia 1970 Jan-Feb;19(1):80-5

[Study of indicators, used in mercurometric titration]

[Article in Russian]

Belilovskii IaE.

I can possibly get it for you but it will take some time...