On some problem of the variational calculus
Card's contents:657,966 657,967 WALCZAK STANISŁAW On some problem of the variational calculus Łódź 1975 Łódzkie Towarzystwo Naukowe 8° s. 10, nlb. 1. Bulletin de la Société des Sciences et des Lettres de Łódź, vol. 24/11