Sularso Sularso
Physics Department of Post Graduate Program Sebelas Maret University,
Jl. Ir. Sutami 36A Kentingan Jebres Surakarta 57126, Indonesia Indonesia
Widha Sunarno
Indonesia
Sarwanto Sarwanto
Physics Department of Post Graduate Program Sebelas Maret University,
Jl. Ir. Sutami 36A Kentingan Jebres Surakarta 57126, Indonesia Indonesia