Pigott, Edward (1785). "Observations of a New Variable Star". Philosophical Transactions of the Royal Society75: 127–136. doi:10.1098/rstl.1785.0007. Bibcode: 1785RSPT...75..127P.
Pigott, Edward (1785). "Observations of a New Variable Star". Philosophical Transactions of the Royal Society75: 127–136. doi:10.1098/rstl.1785.0007. Bibcode: 1785RSPT...75..127P.