Faritov Vyacheslav T. «The Pneumatological Doctrines of Nikolai Berdyaev and Sergei Bulgakov: Ecstasy and Kenosis» // Tomsk State University Journal 2020. №452 C.99-107
Markova L.V. «Hegels philosophy as philosophy of spiritual challenge» // 2011. №2 (14) C.148-159
