The phrase "are also contested by" is correct and usable in written English.
It can be used when discussing differing opinions or debates regarding a particular subject or issue.
Example: "The proposed regulations are also contested by several environmental groups who argue they are insufficient."
Alternatives: "are also challenged by" or "are also disputed by".
"If these countries don't want to change their ways with China, they will need to prepare for the sound of cannons," wrote the unapologetically nationalistic Global Times, referring to the 750 islands and spits of land in the South China Sea, known as the Spratly Islands, which are also contested by Brunei, Malaysia, Taiwan and Vietnam.
The state's authority is also contested by smugglers, drug-traffickers and workers in its own customs houses, which bring in 60% of tax revenues.Mr Lugo is further hampered by a lack of political infrastructure.
Lennon has won six of his 15 caps under Capello but his unavailability tonight – he is trying to recover from a groin problem – gave Walcott the chance to reassert his claim to the place that is also contested by Shaun Wright-Phillips, David Beckham and, perhaps, Adam Johnson.
On the other hand, xenotransplantation research was also contested by political parties and NGOs including the Green Party, the Social Democratic Party, the Basel Appeal Against Genetic Engineering, Greenpeace Switzerland, Physicians against Animal Experimentation and the Swiss Animal Protection.
In addition, traditional and popular sports throughout the Americas which are not contested at the Olympic Games are also contested such as bowling and baseball.
Not only is there is no single agreed definition or terminology, the field is also contested both by adherents of particular approaches or participatory practices as well as by researchers and others critical of the unacknowledged consequences of this apparently democratic turn.
Monthly economic figures produced by Chinese state agencies are also hotly contested by analysts, many of whom believe that over-production of goods with increasing amounts of debt are a bigger problem for the economy than officials will admit.
But it is also strongly contested by other scholars, who point out that the science of carbon dating is contradicted by other evidence.
It is also being contested by Green candidate Marianne Bamkin, UKIP's Alan Graves, Lib Dem Lorraine Johnson and Labour's Cheryl Pidgeon.
She was keen to highlight her views that "this is not an anti-British stance, it's simply a reasoned, rational approach to a decision that acknowledges that, while the Union Flag is hugely important to some people as a symbol of their Britishness, it is also hugely contested by those who do not share that allegiance.
