Tanooka H
Science. 1978 Jun 30;200(4349):1493-4. doi: 10.1126/science.96526.
The frequency of mutations in Bacillus subtilis spores irradiated anoxically with ionizing radiation decreased as a result of subsequent anoxic heating to the same extent as the increase in spore survival. This result indicates that DNA damage is the origin of the "thermorestoration" phenomenon.