Paramecium studies

[poohbear]

I am a student at Central Connecticut State University who just 
complete an experiment testing intra specific competition, and 
interspecific competition among Paramecium caudatum and 
Paramecium aurelia as well as the effect when the predator 
Didinium was added. I am looking for references to support my 
data eg. journal articles, papers, books, even a little friendly 
advice would be nice. Thank You.