Encyclopedia
Variational series
Variational series - a set of values of a varying characteristic (RD 52.24.564-96)
Source: "METHODICAL INSTRUCTIONS. PROTECTION OF NATURE. HYDROSPHERE. ORGANIZATION AND OPERATION OF THE SUBSYSTEM FOR MONITORING ANTHROPIC EUTROPHICATION OF FRESHWATER ECOSYSTEMS. RD 52.24.620-2000"
(approved by Roshydromet on November 22, 2000)