It is indeed - I'd suggest the title is modified to add year as it provides context for how long LSTMs have been established before their recent popularity boom.
https://scholar.google.com/scholar?hl=en&q=A+First+Look+at+M...
https://scholar.google.com/scholar?hl=en&q=A+First+Look+at+M...
It's somewhat interesting to see that only recently they become really widely used in certain Deep Learning communities, e.g. speech recognition.