by Minchev, GM, Eddrief, M, Trendafilov, LM, Naradikian, HM, Trendafilov, KL
Published in Vacuum (01.02.1996)

by Németh-Sallay, M., Minchev, G.M., Pödör, B., Pramatarova, L.D.
Published in Journal of crystal growth (1993)

by Kirov, KI, Ivanov, NA, Atanasova, ED, Minchev, GM
Published in Vacuum (1976)

by Kirov, KI, Georgiev, SS, Ivanov, NA, Minchev, GM
Published in Vacuum (01.01.1978)