The phrase "already established before" is correct and usable in written English.
It can be used to refer to something that has been set up or recognized prior to a certain point in time.
Example: "The guidelines for the project were already established before the meeting took place."
Alternatives: "previously established" or "already set up".
His decision to retire was already established before his last fight, against Bugner in July 1971.
All these evidences strongly suggest that the segmental and compartmental architecture of the vertebrate brain was already established before the divergence of agnathans and gnathostomes.
These findings suggest that auditory-specific rhythmic neural activity, which is already established before 6 months of age, involves more speed-efficient long-range neural networks by the age of 12 months when long-term memory for native phoneme representation and for musical rhythmic features is formed.
"Another reason to believe that A. sediba is not a Homo ancestor is that Homo species were already established before A. sediba emerged".
Bilotta adds that this is why the very foundation of divorce is already established before the couple even marries.
Furthermore, transcriptional repression is already established before TBP2 is degraded.
This was particularly perceptible in authors who had already established themselves before the war.
Thus the core of theory of optimal codes was already established long before Shannon developed its mathematical foundation (Shannon 1948; Shannon & Weaver 1949).
Starting next week, Adam Levine, Blake Shelton, Gwen Stefani and Pharrell Williams -- all already established stars before The Voice -- will find themselves in the unique position to help others find fame and fortune.
Campbell's reputation was already established in America before he made his debut in Scotland at the Fruitmarket Gallery, Edinburgh, in 1985.
Ma et al. [13] assume that there exists a routing protocol that has already established multiple paths before the data transmission and that the base station and the sensor nodes have pre-built cryptographic algorithms and pre-distributed keys to generate the session keys before the deployment of WSN.
