Sulfur Letters 1998, 2000, 2001

[tapira1]

Was unable to find them online because they are from before 2002. Perhaps somebody can help me.
TIA

1. Potapov V.A., Amosova S.V., Zhnikin A.R., Sedunova O.V., Starkova A.A.
Stereoselective thioselenation of acetylene // Sulfur Lett. - 2001. - V.24,
No.6. - P.251-256.
2. Potapov V.A., Amosova S.V., Shestakova V.Yu., Malyushenko R.N. A synthesis
of unsymmetrical divinyl chalcogenides // Sulfur Lett. - 1998. - V.21, No.3. -
P.97-102.
3. Potapov V.A., Amosova S.V., Petrov B.V., Starkova A.A., Malyushenko R.N.
Electrophilic addition of organic selenenyl chlorides and bromides to acetylene
// Sulfur Lett. - 1998. - V.21, No.3. - P.109-114.
4. Potapov V.A., Amosova S.V., Starkova A.A., Zhnikin A.R., Doron,kina I.V.,
Beletskaya I.P., Hevesi L. The radical addition of dialkyl diselenides to
acetylenes // Sulfur Lett. - 2000. - Vol.23, No.5. - P.229-238.

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