On boundedness inequalities in the variation of certain Schurer-type operators; pp. 1–9

Potassium iodide catalysis in the alkylation of protected hydrazines; pp. 10–17

The ecological state of Lake Peipsi (Estonia/Russia): improvement, stabilization or deterioration?; pp. 18–28

Approaches to rainfall estimation and forecasting for urban wastewater disposal; pp. 29–33

Content of alkaloids in ornamental Papaver somniferum L. cultivars growing in Estonia; pp. 34–39

Mackey Q-algebras; pp. 40–53

Time-dependent theory of three-step absorption of three light pulses; pp. 54–63

Possible agricultural use of digestate; pp. 64–74

DTRON: a tool for distributed model-based testing of time critical applications; pp. 75–88

Functions’ algebra in nonlinear control: computational aspects and software; pp. 89–107