"Host-Bacterial Mutualism in the Human IntestineArchived 2018-06-21 at the वेबैक मशीन," Fredrik Bäckhed, Ruth E. Ley, Justin L. Sonnenburg, Daniel A. Peterson, Jeffrey I. Gordon; Science 25 Mar 2005, Vol. 307, Issue 5717, pp. 1915-1920, DOI: 10.1126/science.1104816
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"Host-Bacterial Mutualism in the Human IntestineArchived 2018-06-21 at the वेबैक मशीन," Fredrik Bäckhed, Ruth E. Ley, Justin L. Sonnenburg, Daniel A. Peterson, Jeffrey I. Gordon; Science 25 Mar 2005, Vol. 307, Issue 5717, pp. 1915-1920, DOI: 10.1126/science.1104816