Search for an admixture of heavy neutrinos in the .beta.-decay of .SUP.241 Pu

DRAGOUN, O., ŠPALEK, A., RYŠAVÝ, M., KOVALÍK, A., YAKUSHEV, E. A., BRABEC, V., NOVGORODOV, A. F., DRAGOUNOVÁ, N., ŘÍZEK, J. Search for an admixture of heavy neutrinos in the .beta.-decay of .SUP.241 Pu. Journal of Physics G-Nuclear and Particle Physics. 1999, 25(-), 1839-1858. ISSN 0954-3899. E-ISSN 1361-6471.