[en] The reactions ³⁴S(d, p)³⁵S and ³⁶S(d, p)³⁷S were studied at the incident deuteron energy of 12.3 MeV. Proton groups were analysed using a multi-angle magnetic spectrograph with the resolving power E/ΔEapprox.=1400. Precise Q-values corresponding to 13 states of ³⁵S up to the excitation energy of 7483 keV and 22 states of ³⁷S up to the excitation energy of 6406 keV are presented. The ground-state transition Q-value for the reaction ³⁶S(d, p)³⁷S was found to be 2079.12+-0.13 keV. Angular distributions of proton groups corresponding to 6 states in ³⁵S and to 11 states in ³⁷S were analysed using DWBA calculations. Transferred orbital angular momenta and spectroscopic factors were deduced. Summed spectroscopic strengths show that substantial parts of single-particle strength for 1fsub(7/2), 2psub(3/2) and 2psub(1/2) in both reactions are exhausted by the observed transitions. (orig.)