Proceedings of the Estonian Academy of Sciences

Sisukord:q-Calculus as operational algebra; pp. 73–97 Thomas ErnstRemoving the input derivatives in the generalized bilinear state equations; pp. 98–107 Tanel Mullari, Ülle Kotta, Palle Kotta, Maris Tõnso, Alan S. I. Zinober On the Pringsheim convergence of double series; pp. 108–121 Balmohan V. Limaye, Maria Zeltser Ultra performance liquid chromatography analysis of adenine nucleotides and creatine derivatives for kinetic studies; pp. 122–131 Peeter Sikk, Tuuli Käämbre, Heiki Vija, Kersti Tepp, Toomas Tiivel, Anu Nutt, Valdur Saks Research of oxygen mass transfer through the air–water surface at low bulk concentrations of surfactants; pp. 132–136 Erik Mölder, Taavo Tenno, Toomas Tenno