GENERATION OF 2ND HARMONICS IN LINBO3-TI BAND WAVEGUIDE Article BIKEEV O.N., DERYUGIN L.N., REUTOV A.T. ZHURNAL TEKHNICHESKOI FIZIKI / Technical Physics. The Russian Journal of Applied Physics. MEZHDUNARODNAYA KNIGA / ФТИ им. А.Ф.Иоффе.. Vol. 49. 1979. P. 2499-2501
YIELD STRUCTURE OF FORAGE GRASSES IN MONODOMINANT STANDS Article BELIUCHENKO I.S. BEITRAGE ZUR TROPISCHEN LANDWIRTSCHAFT UND VETERINARMEDIZIN. KARL-MARX-UNIV. Vol. 16. 1978. P. 121-135