The phrase "are considered by several" is correct and usable in written English.
It can be used when discussing opinions or beliefs held by a group of people regarding a particular subject or topic.
Example: "These theories are considered by several experts to be the foundation of modern physics."
Alternatives: "are viewed by many" or "are regarded by several".
However, such models are not inclusive and fail to logically justify the viability of an ATFM action implemented given that only a single attribute is taken into account when, in practice, a number of attributes are considered by several decision-makers in the air transportation system.
For this reason, they are considered by several authors to be of special interest in the fermentative processes [ 5, 22, 23], representing a promising alternative approach [ 5], in some cases even showing better performances than pure strains [ 24].
Mr. Schumer, a Democrat, is seeking to block nearly $700 million in transportation projects being considered by several agencies under the control of Mr. Pataki, a Republican.
If it passes, Los Angeles would join only three small cities, San Luis Obispo, Calif., Lodi, Calif., and Aspen, Colo., although such a ban is being considered by several others.
The so-called "ag-gag" laws now being considered by several states, including California, Illinois and Indiana, have nothing to do with protecting property.
Supersaturated designs for searching active factors in screening experiments involving several factors at two levels have been considered by several authors.
Final disposal of high-level radioactive waste in deep repositories located in fractured granite formations is being considered by several countries.
The second rule has since been recommended by an N.C.A.A. committee as standard policy for athletes in all sports, and will be considered by several state legislatures that have bills governing high school athletics before them.
Today, Mr. Reagan did not talk specifically about human rights in the Soviet Union, but his comments about "humanitarian issues" were considered by several viewers as an allusion to the handling of dissent.
In "Delta Wedding," Miss Welty concentrates on the frenzied activities of the extended Fairchild family in the week before the marriage of a daughter to the plantation's overseer, who is considered by several of the Fairchilds to be an intruder unworthy of admission into the family.
