TTretʹi͡a problema GilʹbertaTretʹi͡a problema Gilʹbertade V. G. Bolti͡anskiĭMateriasTetrahedraEdiciones (1)Tretʹi͡a problema Gilʹberta (1977)Izd-vo Nauka · rusoMás obras de V. G. Bolti͡anskiĭThe decomposition of figures into smaller parts1980EEnvelopesEnvelopes1964Equivalent and equidecomposable figures1963