Vechnoe solnt︠s︡e--russkai︠a︡ sot︠s︡ialʹnai︠a︡ utopii︠a︡ i nauchnai︠a︡ fantastika, vtorai︠a︡ polovina XIX-nachalo XX veka - Kalmykov, S. (Molodai︠a︡ gvardii︠a︡, 1979)