It is apparent that the production of Oyster mushroom in early 80's was negligible but due to simplicity of cultivation procedure and broad adaptability of different Pleurotus species, the Oyster mushroom has emerged as a mushroom of significance and it is expected that the production will continue to increase especially in South-East Asian countries.

1958: Here, some eighteen thousand people then lived, surrounded by cyclopean walls of polygonal masonry which, on the western slopes, connected three towers or acropoli at projected points above ravines. — Orcutt William Frost, Young Hearn (Hokuseido 1958, p. 9)

[…] once or twice, when he cut up bad, she appeared to him, and scratched his face with her ten commandments […]

A residuated lattice is an extension of a bounded lattice by a monoid operation and its residuum, which are abstract counterparts of a triangular norm and a fuzzy residual implication, respectively.