Aupetit Bernard; ifj. Makai Endre; Zemánek Jaroslav: Strict convexity of the singular value sequences. In: Acta scientiarum mathematicarum, (62) 3-4. pp. 517-521. (1996)
Makai Endre: Bounds for the principal frequency of a membrane and the torsional rigidity of a beam. In: Acta scientiarum mathematicarum, (20). pp. 33-35. (1959)