Aleksandr Buzgalin has published monographs and numerous articles on the capitalist and socialist economic systems, including Twenty-First-Century Capital (with co-author Andrey Kolganov).Lyudmila Bulavka-Buzgalina has published monographs and numerous articles on Soviet culture, including The Phenomenon of Soviet Culture.Andrey Kolganov is Head of the Laboratory for Comparative Studies of Socio-Economic Systems at Lomonosov Moscow State University. Among his recent publications on capitalist and socialist economic systems is Twenty-First-Century Capital (with co-author Aleksandr Buzgalin).