https://naked-science.ru/article/anthropology/neolithic-pits?_gl=1*c8et2j*_ga*YW1wLTBxcGdKTUVkdnVLd3lWLTRFWUQwaWJJbEk4VktSd3hVR1dtMkxsYU43cUUxcV92OWw5X2pKeEhYejhvVzJ3cGY.