Bear, Isabel Joy; Thomas, Richard G. (March 1964). ”Nature of argillaceous odour”. Nature 201 (4923): sid. 993–995. doi:10.1038/201993a0. Bibcode: 1964Natur.201..993B. ”The diverse nature of the host materials has led us to propose the name 'petrichor' for this apparently unique odour which can be regarded as an 'ichor' or 'tenuous essence' derived from rock or stone […] it does not imply that petrichor is necessarily a fixed chemical entity but rather it denotes an integral odour, variable within a certain easily recognizable osmic latitude.”.
Bear, Isabel Joy; Thomas, Richard G. (March 1964). ”Nature of argillaceous odour”. Nature 201 (4923): sid. 993–995. doi:10.1038/201993a0. Bibcode: 1964Natur.201..993B. ”The diverse nature of the host materials has led us to propose the name 'petrichor' for this apparently unique odour which can be regarded as an 'ichor' or 'tenuous essence' derived from rock or stone […] it does not imply that petrichor is necessarily a fixed chemical entity but rather it denotes an integral odour, variable within a certain easily recognizable osmic latitude.”.