... Hoek, Mikhail Ioffe, Petr Kulish, Wolfgang Kummer, Antti Kupiainen,Jorma Louko, the late Mikhail Marinov, Kazuhiko Nishijima, Matti Pitk¨anen, Dmitri Polyakov, AdamSchwimmer, Konstantin Selivanov ... (1954 ), Gelfand and Minlos (1954 ), Khalatnikov (19 5 2, 1955 ), Mathews and Salam (1954 ), Edwards and Peierls (1954 ), Symanzik (1954 ), Fradkin (1954) and others. Other areas of applications of path integrals ... (Feynman 1955) and invented his variational principle for quantum mechanics. Thiswork had an important impact on further applications of path integrals in statistical and solid state physics, as...