'various variants' is correct and usable in written English.
You can use it to refer to different versions of something. For example: "The classic tale of Cinderella exists in various variants across different cultures."
The spitball and various variants were forbidden to both leagues simultaneously in 1920.
"I have flown more than 2,000 hours in various variants of the MIG-21, from the earliest Type 77, the updated Type 96 and the Bison.
Various variants of Thomas' algorithm (monotone, nonmonotone, cyclic, etc).
In fact, the theory developed in this work can easily be extended to its various variants.
Moreover, various variants were developed over the last decades, see for an overview (Gurtin et al. (2010), §90).
Various variants of VNS have been proposed since then, but the basic idea is a systematic change of neighborhood combined with a local search [23, 32].
PSO and various variant PSO or hybrid PSO have demonstrated their performance in solving these scheduling problems.
Therefore, we have various variant PSO, such as PSO for outlier detection, PSO for classification, PSO for association rule mining and PSO for prediction analysis for time series.
Detailed crystallographic analysis was carried out on the martensitic transformation and the various variant combinations in 18R martensite in a Cu Zn Al alloy.
Table 1 shows that on average 13,775,275 variants are called by the various variant calling methods for all mice.
After extraction from the database, 2746 missense mutations were collected from the various variant callers (Fig. 2A).
