Pearl Growing strategy (Snowballing) in Library Literature

Thesis for the paper that I am working on:

Theoretical models and demographic data reveal that human information seeking habits remain generally the same regardless of the interface in which information is sought

At this point I am specifically looking for information on the information seeking behaviors of people using digital information sources.

Pearl:

University College of London. (2008). Information behaviour of the researcher of the future. London: University College of London. Retrieved from http://www.bl.uk/news/pdf/googlegen.pdf.

I have used this report extensively in my paper so far. I had to find an edited version of it that was available in a database. This is the same report, just slightly edited for journal publication.

Nicholas, David (08/01/2008). "The Google generation: the information behaviour of the researcher of the future.". Aslib proceedings (0001-253X), 60 (4), p. 290.

I found the article in the Library Literature database. The subject terms given for the article were:

Microcomputers/Children's use
Internet searching/Evaluation
Information retrieval/Social aspects
Virtual library

S1 (using All - Smart Search field):
(Internet searching/Evaluation) and (Virtual library) = 19 hits

None of the hits were really relevant, so I tried again.

S2 (using Subject(s) field):
(Internet searching/Evaluation) and (Information retrieval/Social aspects) = 2 hits

The first article was my pearl, the other wasn't quite what I wanted. I decided to modify one of the terms.

(Internet searching) and (Information retrieval/Social aspects) = 11 hits

The results of the 3rd search were better.

Citation:
Aula, Anne, and Käki, Mika. "Less is more in Web search interfaces for older adults" First Monday [Online], Volume 10 Number 7 (4 July 2005)