Spravochnik ekonomista (The Economist's Reference Book) Eberhard Fels; Grigan Zosimovich Kuparadze Econometrica 1961 29(4), 817
Primenenie matematiki v ekonomicheskikh issledovaniakh (The Application of Mathematics in Economic Research) Eberhard Fels; V. S. Nemchinov Econometrica 1961 29(4), 818
Uchonye zapiski po statistike (Learned Writings on Statistics) Eberhard Fels; V. S. Nemchinov Econometrica 1961 29(4), 814