This first sentence identifies the topic that the rest of the paragraph will be about: the findings of an experiment. The article's name is cited in the sentence, along with the names of the authors of the publication. Subsequent citations will most likely not include the title again.
If you didn't cite the author or authors' names in the phrase before the quotation, you should place those names in the parenthetical citation. Because there are more than two authors, you should list the first author's last name and then replace the others with et al. You will need to include the page number for any quotations or paraphrases.
Quotations should be surrounded by quotation marks. If the quotation ends in an exclamation point or a question mark, but that punctuation right before the closing quotation mark. Commas and periods aren't placed at the end of the quotation. They are placed at the end of the citation.
You should include at least one sentence after a quotation or paraphrase that sums up why that quotation or paraphrase was so important to your thesis statement or the major point you are supporting in that place in the paper. This usually means that you should not end a paragraph with a quotation because you would not be providing enough context for why the quotation is important.