[1] Knightly G. H.: An existence theorem for the von Kármán equations. Arch. Rat. Mech. Anal., 27 (1967), 233-242. MR 0220472 | Zbl 0162.56303

[2] Knightly G. H., Sather D.: On nonuniqueness of solutions of the von Kármán equations. Arch. Rat. Mech. Anal., 36 (1970), 65-78. MR 0261835 | Zbl 0188.57603

[3] Langenbach A.: Über Gleichungen mit Potentialoperatoren und Minimalfolgen nichtquadratischer Funktionale. Math. Nachr., 32 (1966), 9 - 24. MR 0209912 | Zbl 0154.39903

[4] Morozov N. F.: Nonlinear problems in the theory of thin plates. (Russian). Vestnik Leningr. Univ., 19 (1958), 100-124. MR 0102224

[5] Nečas J.: Les méthodes directes en théorie des équations elliptiques. Academia, Prague 1967. MR 0227584

[6] Nečas J., Poracká Z., and Kodnar R.: Remarks on a nonlinear theory of thin elastic plates. Matem. časopis, 20 (1970), 62-71. MR 0303085

[7] Sharij Ju. I., Jurchenko A. S.: Dirichlet's problem for equations of Karman's type. Diff. urav., 4 (1968), 1713-1719. MR 0235279

[8] Vorovich I. I.: On the existence of solutions in nonlinear theory of shells. (Russian). Izv. Akad. Nauk, ser. mat., 19, no. 4 (1955), 173-186. MR 0072369

[9] Vorovich I. I.: On some direct methods in nonlinear theory of shallow shells. (Russian). Prikl. Mat. Mech., 20 (1956), 449-474. MR 0081672

[10] Vorovich I. I.: On the existence of solutions in nonlinear theory of shells. (Russian). Dokl. Akad. Nauk, SSSR, 117 (1957), 203-206. MR 0093988