Within a short time polyoma virus became the main interest of my laboratory, to be joined, a few years later by SV40, another papovavirus.    From Wordnik.com.  [Renato Dulbecco - Nobel Lecture] Reference

These were important results for understanding the biology of this papovavirus and helped move the laboratory into a very rapidly advancing field of research - the molecular and cell biology of tumor viruses.    From Wordnik.com.  [Phillip A. Sharp - Autobiography] Reference